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