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