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