Unfortunately for your paper, what you're looking for doesn't really exist as the type of more detailed data that you're looking wasn't asked on a widespread basis until exit polls in the late 1960s.

What we consider polling didn't really begin until George Gallup came up with the idea to sell more reliable public surveys to the press in 1935 which then took off with the gift of the disaster of the Literary Digest 'poll' in 1936 which predicted that Al Landon would clobber FDR, rather than vice versa.

There are some polls of major East Coast and Midwest urban centers pre-1940, but California was considered electorally unimportant enough that neither campaigns nor news agencies were interested in doing so there.

Now if you get interested enough to keep studying this in university and have the ability to do primary source research, there are indeed ways to make some guesses as to registration and turnout by race or religion or gender, but they generally involve going through census data and extrapolating results from heavily segregated precincts. Even that has problems, which I'll let someone who went through this process explain:

"Such aggregate data can provide useful insights, but this approach is susceptible to the ‘‘ecological fallacy’’ of inferring individual behavior from aggregate data. The classic example of the danger of using aggregate data comes from the fact that Southern counties with a higher percentage of blacks gave a higher vote to States Rights presidential candidate Strom Thurmond in 1948. However, it would be fallacious to infer that blacks were voting for Thurmond, since blacks were not voting in the South at that time. Instead, votes for Thurmond were coming from white voters in counties with large black populations." (Weisberg, Reconsidering Jewish Presidential Voting Statistics, Cont Jewry (2012) 32:215–236)

So, the short answer is that a better approach for a term paper might be to figure out how to incorporate research done on California in general in the 1932 election as well as the experience of the African American population in it at the time (comparing it to the South with the poll tax and suppression and such, for instance, and regions within California where any African American elected officials might have been in local office), which perhaps your school librarian can help you with finding resources to assist you.

Best of luck!

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