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