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