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