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