Uncle Sam Just Told Us To Drink Water, Not Soda. You Might've Missed It http://n.pr/1TI2QUx
The guidelines, and the pictures, should be, and could be, very simple.
More... fresh fruits and vegetables. More water. More exercise.
Less... Processed foods, red meat, and sugary soft drinks.
Simple. And fits nicely into almost any diagram you want to make.