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