Congratulations! Now, take a breath and relax a little, and take some time to get to know your new sisters.

I would be surprised if elections are scheduled to be held before there is a period of new member education and getting to know each other. Do you have a consultant there to guide the new colony? If so, she will lead you, familiarize you with the sorority, and guide you through the elections process. Typically, there is some form of nominations process that results in a slating of candidates. There will be a need for many different leaders, and nominations generally are a process of matching positions with members' individual skill sets. Your sisters may see you as a potential president, or they may see another position as a great fit for you. "Campaigning" doesn't usually go over well, though, and can backfire -- take the time to get to know all of your new sisters and be a good sister to them.
This is a very different process from, say, high school student council elections. Generally, sisters don't decide to "run against each other for the same position" -- you are all working together for the good of the chapter and each other; it's not about self-promotion or internal competition.