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