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