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