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