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