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