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