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