Short and sweet.
Print or trace the block diagram onto a sheet of paper.
Cut a 6" x 6" square out of background fabric.
Using a light table or bright window, mark the positions of the shapes on the background fabric square. This makes positioning the applique shapes much easier.
Using your favorite applique method, applique the leaf shapes and square into position on the background fabric square.
Trim the block to 5" x 5", centering the appliqued pieces carefully.
(This block is not skew. I think I took the photo at an angle.)