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)(13,17)(14,16)(15,18)(19,20,24,22)(21,27,28,25)(23,26,31,30)(29,33,34,32)(4,7)(8,9)(11,12,14,16)(13,15,18,17)(21,28)(23,31)(25,27)(26,30)(3,4)(5,8)(6,7)(9,10)(11,12)(13,15)(14,16)(17,18)(19,21)(20,25)(22,27)(23,29)(24,28)(26,32)(30,33)(31,34) involution — undirected(3,5)(4,8)(6,10)(7,9)(11,13,14,18)(12,15,16,17)(19,22,24,20)(21,25,28,27)(23,30,31,26)(29,32,34,33)(19,23,24,31)(20,26,22,30)(21,29,28,34)(25,32,27,33)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.