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