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