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