GraphViz is a great library that can help to visualize simple relations. However the libraries and viewers are kind of outdated or bloated.
There are many client option but try to fing a simple viewer for windows - good luck.
The most easy way is to use an online tool like:
Further for windows there are not good editors, we can use the CLI dot and included viewer but they certainly feel "ported" from an old UNIX* like environment. Other options are: