Generates https://view.commonwl.org/ like images, showing a complete workflow in one image.
$ git clone https://github.com/wtsi-hgi/arvados-pipelines
$ cwl-graph-generate arvados-pipelines/cwl/workflows/gatk-4.0.0.0-haplotypecaller-genotypegvcfs-libraries.cwl > graph
$ dot -Tpng graph > output.png
This project was created with the sole purpose of creating the graph above, so the code is not written from a standpoint of maintainability or stability.