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