Have you heard of a Hera marker? It is a plastic tool that will make a sharp crease in your fabric. I use it all the time for marking on quilts.
Another option in to use Press N Seal. Draw the design on the plastic with a marker (frixon maybe); press the plastic onto your fabric and sew. Haven't tried this but sounds like just the thing you might want to do. Here's a link that may help:
http://ajpadilla.com/tutorials/marki...ng-designs-pns