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