Most likely, a polling site or sites may already be designated near your campus. (The same for other campuses too.)
State law dictates voting sites based on the number of registered voters in the area. So FIRST and FOREMOST you need to
get students registered to vote.
Equally important for "out of town" & "out of state" students who are registered back home. Either have them re-register or change their registration to your local community. Or help them secure an absentee ballot.
For more information please check out the following.
California Elections & Voter Information