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