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