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