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