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