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