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