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