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