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