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