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