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