Constructing a link to an Office 365 Plan from the Graph API

[Sanguis]

Cross-posting from the Planner community:

I'm trying to figure out how I can utilize the Microsoft Graph API to construct a link to an Office 365 Plan connected to a specific Office 365 Group. I've been able to link to almost all other resources tied to an Office 365 group by using the groupstatus.apsx page. Has anyone been able to solve this puzzle?

Example of a link to the documents for an Office 365 Group:
https://[tenantName].sharepoint.com/_layouts/groupstatus.aspx?id=[groupId]&target=documents

[#2]

Have your tried Microsoft Graph Exployer?  You can use it to find the endpoint you are looking for.  The beta returns JSON with all the data relationships.  Many of the groups objects show up here.