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