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