Here is the main page for Syrian diplomatic cables. Navigate around to get used to how searches can be carried out. And go here for a narrative from Wikileaks on the cables and their meaning.
Remember, as of early July this huge reservoir of information is just a trickle. Watch the world's best newspapers for in-depth articles on particular aspects, but it's going to take a while for this process to really get into gear: 2.4 million cables is quite a lot of information, and the total size of the inventory will be 100 times greater than the US diplomatic cables released by Wikileaks earlier.