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