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