Displaying objects connections with flask

I have a DB table which refers to itself. For example let's say I have a list of employees, some of them are other employees' bosses. Of course I have SQLAlchemy objects of this table.
I want to visualize the connections with a graph - each employee is a node, and a line is connecting each employee to his boss.
Is there a way to do it using flask? Or any other python or web framework?