The topic of graph theory is usually very malignant. The point of cancer is that drawing is relatively cumbersome.
Recently get to a good online drawing application.
https://csacademy.com/app/graph_editor/
The usage is very simple.
Enter the edge of the graph (can Gaben)
Points can be used without input.
The graph is updated in real time.
15 points or less, the automatically generated diagram is still relatively beautiful.
If you want to change the structure of the diagram, you can use the mouse to drag a node.
Of course, you can also click on the point to fix the point position.
Then there are some other settings.
For example, the set of graphs and graphs.
You can also change the color.
There are other features as well.
With a use or very useful.
(Of course, hand drawing may give you some inspiration, it can not be replaced by this)
Graph theory drawing powerful tool csacadmy app graph Editor