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