How to Make a Site Map
To make a map like this, use a repeated selection of three images like those below. Drag these images to your page and duplicate as many times as you need.
To make the links to each line of text, use the Links tab of the Quick Editor, and link to the whole text object.
Downside
All these images, especially the short lines, added up to a lot of page space. The images themselves are small, and are reused, but the code, using CSS positioning takes up a lot of space. I did a test and found that adding one short straight line added another 312 bytes to my html file.
So I have replaced all the short lines with one long thin line, and saved about 12K of html page space. I have not replaced the other two images, as I don't believe there would be much extra saving.