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