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