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