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