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