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