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