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