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