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