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