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