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