Over the last week or so, I created a bunch of hanging cleats to store the parts. I did it completely with scraps of plywood and 2x4 material I had in my garage.
For the sawhorse legs, I created two hanging braces with some plywood stops that allow me to hang two legs on each brace.
For the sawhorse stretchers, I created horizontal brace with some 2x4 material cut lengthwise. It lets me slip those two stretchers in and keeps everything in place.
For the grid stretchers, I created a couple of U shaped braces hung on the wall where the stretchers can be slipped into.
This picture explains it easier than the words can.
Bonus storage. After I completed the sawhorse grid storage, I had a bunch of blank wall space that I wanted to be able to hang cords, tools, and the like. I had some left over peg board from the storage cabinet, so I made a 4 foot by 28 inch panel. It is that size because I can make two of them.
I ripped down some 3/4" ply into 2" strips and used Kreg screws to make a frame then mounted it to the wall.
To show the usefulness I hung some of my gear onto it including a few things that I used to just have propped in the corner.