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