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