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