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