One vertex per element, one color per generator, with an edge from x to x·s.
(2,5)(3,7)(9,10)(11,15)(12,14)(13,16)(18,22)(20,27)(23,28)(24,29)(26,31)(30,32) involution — undirected(1,2,4,5)(3,6,7,8)(9,11,12,16)(10,13,14,15)(18,23)(22,28)(24,30)(29,32)(11,16)(13,15)(17,18,21,23)(19,24,25,30)(20,28,27,22)(26,32,31,29)(1,3,4,7)(2,6,5,8)(10,14)(13,15)(17,19,21,25)(18,24,23,30)(20,26,27,31)(22,29,28,32)(2,5)(6,8)(19,25)(24,30)(26,31)(29,32) 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.