The way to do this at present appears to be to:
- Create a new layout and give it a name
- Add players and select Remove All Flows From This Layout
- In the Flow panel at the bottom of the Setup view, right-click the flow you want to appear in your layout and select your new layout from the menu options.
- Apply any Layout Options necessary
You can now print your new layout which contains only the flow that you left in. You could repeat for each flow.