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