Recommendation of a network diagramming app

[DominikHoffmann]

I would like to diagram my home network. I am looking for an app that will help me do that quickly and easily, so that I don’t have to pull out Illustrator and painstakingly do by hand what such an app would do automatically.

Something that would allow me to do diagrams like these (hopefully more esthetically pleasing):

 

[svenmany]

I use OmniGraffle for these kinds of drawings. There might be specific stencils that can give you images like the ones you show.