If theology means your basic understanding of the universe, then UUs are actually not a very theologically diverse people. We all are actually in one religion. If theology means the language and symbols through which you articulate your understanding, well then, yes, there is a certain amount of diversity there. But, for example, there's an enormous amount of unity about the idea that we are diverse...
The God of the UU's is a God of many faces.
"Hey, that's a metaphor. It may not be the ultimate truth."
The God of the UUs is a God that encourages questioning and dialogue, heresy and open eyes.
"Okay, look, stop saying God. We're atheists. I get my spiritual experience through hiking in the woods, and I get my truth from a scientific study of reality."
The God of the UUs is a God of earth and science, a God of this physical world, is the world itself, with all of its ordinariness, complexity and beauty.
(There are lots of people around to talk about theology so I'm not going to dwell too heavily on the topic now.)