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