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