One vertex per element, one color per generator, with an edge from x to x·s.
(1,2) involution — undirected(3,4)(5,11,13,8)(6,14)(7,10)(9,15)(12,16,18,17)(19,20,22,26,23,25,29,32)(21,24,27,31,28,30,33,34)(3,5,7,13)(4,8,10,11)(6,12,15,18)(9,16,14,17)(19,21,23,28)(20,24,25,30)(22,27,29,33)(26,31,32,34)(3,6)(4,9,10,14)(5,12)(7,15)(8,16,11,17)(13,18)(20,25)(22,29)(24,30)(27,33)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.