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