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