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