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