Good to see you are on Thwack. You can do what you are asking today with the Orion Report Scheduler (under SolarWinds Orion>Advanced Features). The Report Scheduler asks for a URL which is normally the URL of a report through the Orion website. Nothing is restricting you from using a URL of a graph in the Orion website.
Hope this helps. Hope you are well.
While this does work, it is not supported by SolarWinds. Support would not help me with my case when I had scheduled graphs e-mailed to me.