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