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