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