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