The U of U is a great place if you want diversity in the Mountain West. Most people this side of the Mississippi are of European decent, and Utah is no different. However, the U of U attracts people from all corners of the globe. You will be able to find people from all sorts of different backgrounds.
When most people think of Utah, they think of the Mormons. This is true—there are a lot of Mormons. However, most of the Mormon zealots attend BYU, which leaves those who are more socially open to attend the U, which creates an atmosphere of acceptance and understanding. Therefore, more people who want to experience what the great state has to offer attend the U. Those who are closed-minded attend BYU. On the flip side, the U's professors are mostly white. There are not many faculty members that come from different parts of the world. This could create problems with background and culture biases.