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