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