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