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