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