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