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