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