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