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