First, zed into camille is a horrible matchup once you both get some items assuming you are equally skilled and fed. Now, for some tips on how to beat her:
-Your biggest advantage by far is that you push harder than her. Once you hit 6 shove to tower and roam, get fed elsewhere and fight her with an item advantage.
-If you must fight her in lane, you have to take every small advantage you can get. First of all, try to fight in favorable minion waves, using the aforementioned pushing advantage you should be able to accomplish this. Take into account that you will need to ward very safe, because if you use shadows to push you could be very vulnerable to ganks assisted by her hookshot. Then, try to avoid extended trades, because she will hit you with a empowered q.
-This is only assuming that she does not have her shield, if she does you cannot trade with her whatsoever unless you are already at a health advantage.
-Another advantage that you have is the poke advantage, as long as you dodge her w you should be able to outpoke her with your shurikens and some shadow combos.
This whole thing here can basically be summarized in that you will have to push agressively against her so that you have possibilities to roam, the minion advantage in any fight that breaks out and ease to harass her aggressively, but you need to take ganks into account if you are going to do so. Correct wave manipulation is key here. Also, stay closer to the center of the lane so that you have more time to avoid wall jumps. Understand that you are in a bad 1v1 matchup and do not get frustrated, but as Zed you are much better suited for the roam potential of midlane and thus you need to take full advantage of it.