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