I tried to use yEd to generate the graph Kister want.
we need to add one dummy at both end of the sandwich connect to the edge strand of both sheets, and add one group at the interlock on both sheet, and add one group contents each sheet.
Then, run the Organic-classic layout.
Then, remove two dummies, and delete group on interlocks.
you'll get a pretty good result.

BUT, yEd is commercial software, which cost $$$.