I know how to draw a Dynkin diagram and add labels on the vertices
 using Tikz-cd or the package for Dynkin diagram, but how to draw an automorphism intuitively as in the following picture? I don't know how to draw those curly arrows on the diagrams.

[![[](https://i.stack.imgur.com/jD3dc.png)](https://i.stack.imgur.com/jD3dc.png)