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