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)(17,18)(19,26)(20,24)(21,30)(22,27)(23,28)(25,29)(31,32) involution — undirected(1,2,4,5)(3,6,7,8)(9,11,12,16)(10,13,14,15)(17,19)(18,22)(20,27)(21,28)(23,25)(24,26)(29,31)(30,32)(11,16)(13,15)(17,19)(18,23)(20,27)(21,31)(22,25)(24,32)(26,30)(28,29) involution — undirected(1,3,4,7)(2,6,5,8)(10,14)(13,15)(17,19)(18,22)(20,27)(21,28)(23,25)(24,26)(29,31)(30,32)(2,5)(6,8)(19,27)(22,26)(23,32)(28,31) 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.