One vertex per element, one color per generator, with an edge from x to x·s.
(1,2) involution — undirected(8,10)(11,12)(13,16)(14,19)(15,18)(17,22)(20,23)(21,25)(24,26) involution — undirected(4,5)(12,13)(17,19)(18,20)(24,25) involution — undirected(3,4,6,5)(7,8,9,10)(11,13,16,12)(14,19,22,17)(15,20,23,18)(21,25,26,24)(11,14,16,22)(12,17,13,19)(15,21,23,26)(18,24,20,25)(3,5,6,4)(11,15,16,23)(12,18,13,20)(14,21,22,26)(17,24,19,25)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.