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