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