This is the graph of this blog.
The author use colour to represent the tags in the HTML documents. Here is the legend:
blue: for links (the A tag)
red: for tables (TABLE, TR and TD tags)
green: for the DIV tag
violet: for images (the IMG tag)
yellow: for forms (FORM, INPUT, TEXTAREA, SELECT and OPTION tags)
orange: for linebreaks and blockquotes (BR, P, and BLOCKQUOTE tags)
black: the HTML tag, the root node
gray: all other tags
You are encouraged to to put your graph on flickr, and tag it "websitesasgraphs". Here is the link to the flickr pool.