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