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