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