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