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