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