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)(11,12,14,16)(13,17,18,15)(20,24)(25,26)(4,5)(8,9)(11,13,14,18)(12,15,16,17)(19,20)(21,25)(22,26)(23,24)(11,13)(12,15)(14,18)(16,17)(19,21,23,22)(20,25,24,26)(3,5,7,4)(6,9,10,8)(11,13)(12,15)(14,18)(16,17)(19,22,23,21)(20,26,24,25)(3,6)(4,8)(5,9)(7,10)(11,12)(13,15)(14,16)(17,18)(19,20)(21,25)(22,26)(23,24) involution — undirectedA 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.