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