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