This package adds syntax highlighting and snippets to Dot files in Atom.
The snippets are the representation of what I find useful. You can add them by using a pull request.
Obviously, you can also add grammar tweaks (for colorschemes) and report issues.
It is available at atom package, you can install it by using the apm manager.
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.