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