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