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