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