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