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