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