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