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)(13,22)(14,19)(15,20)(16,25)(17,21)(18,23)(24,26)(3,5,8,4)(6,10,7,9)(11,13,17,14)(12,18,21,26)(15,23,16,24)(19,25,22,20)(3,6,8,7)(4,9,5,10)(11,14,17,13)(12,19,21,22)(15,23,16,24)(18,25,26,20)(3,6,8,7)(4,9,5,10)(11,15,17,16)(12,20,21,25)(13,23,14,24)(18,19,26,22)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.