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