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