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