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