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