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