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