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