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