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