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