For Stanford and the Ivies, you absolutely should retake the ACT. Have you tried the SAT? Maybe that is a better test for you. Your 32 composite is fine for most colleges. However the “top Ivies” (whatever that means) and Stanford attract tons of applicants with extremely high standardized test scores…tons. Less than 10% get accepted, and in the 90% who are denied admission, most are extremely well qualified applicants.
In addition, I’m hoping this isn’t your whole application list…because if it is, it is extremely top heavy. You need some match and sure thing schools on your application list.
Your schooling at these generous schools will not be free even if you are accepted. Depending on the school, you will have a student contribution which can be several thousand dollars. In addition if your family has a family contribution as the college calculates, your family will be expected to pay that.
What is your GPA?