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