If I understand correctly, you are saving Safari bookmarks to your home screen? But, you don't get pretty icons like you want?
If so, one thing to try is an icon creator app. With it, you can download a nice picture or logo representation of th eweb site and use the app to make a nice icon with that picture. While there are a few apps, the one I use is called "Touch Icon Creator" ($0.99, USD).
Maybe that is what you're are looking for?
Marilyn