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