One vertex per element, one color per generator, with an edge from x to x·s.
(5,6)(7,8)(9,10)(11,14)(12,16)(13,15)(17,18,20,25,21,23,30,24)(19,26,28,31,29,32,27,22)(1,2)(3,4)(9,11,13,12)(10,14,15,16)(17,19,21,29)(18,22,23,31)(20,27,30,28)(24,26,25,32)(2,4)(9,12,13,11)(10,14,15,16)(18,23)(22,31)(24,25)(26,32)(6,8)(18,24)(19,27)(20,30)(23,25)(26,32)(28,29) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.