A few quick tips... Don't have so much space between plants, when they grow in they can touch each other- it will look good. Don't plant everything in straight lines. Think odd numbers, instead of planting one, plant three or five. Layering is important too, short plants up front, larger in back. Makes it interesting. And I would stay away from the straight bed edges- think curvilinear.
I like the way you blue printed out the house, that should be a sufficient pallet for showing your plans. I would label the plants as letters and have them go to a key. And when you draw the lines to label the plants, use straight lines. Use different symbols for different plants.
Good luck you got this