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