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