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