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)(19,26,28,32,29,22,27,31)(1,3,4,8)(2,5,6,7)(9,10)(11,14)(12,13)(15,16)(17,19,21,29)(18,22,24,26)(20,28,30,27)(23,32,25,31)(10,13)(14,16)(17,18)(19,22)(20,23)(21,24)(25,30)(26,29)(27,31)(28,32) involution — undirected(9,11)(10,14)(12,15)(13,16)(17,20,21,30)(18,23,24,25)(19,27,29,28)(22,31,26,32)(11,15)(14,16)(17,20,21,30)(18,23,24,25)(19,28,29,27)(22,32,26,31)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.