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