Looking for a site graph or map, class diagram Follow

Hi All,

Im Looking for a site graph or map, i have a hug Magento application and I need some kind of class diagram graph to show me the relations between classes and dependency.

I know there is a plugin to show a class diagram for a single class but i need some kind of overview not really detailed one.

Can PHPStorm generate such thing or there is a plugin that can do that ?

thanks a lot guys.