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