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