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)(11,16)(12,17)(13,15)(14,18)(19,22)(20,24)(21,23) involution — undirected(2,7)(3,8)(4,5)(10,15)(11,19)(12,13)(16,23)(17,18)(20,21) involution — undirected(1,3,5,8,6,7,4,2)(9,11,13,19,14,21,12,20)(10,16,17,24,18,23,15,22)(1,4,6,5)(2,3,8,7)(9,12,14,13)(10,17,18,15)(11,20,21,19)(16,24,23,22)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.