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