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