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