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