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