Have an excel with a list of persons.
I *have their levels in the hierarchy ...
... is there a wizard that automates the process of
creating ORG CHARTS in sunflower model...

Microsoft's Visio has a feature like that; see:
http://office.microsoft.com/en-gb/visio/

I'm not running the latest version, so I can't give you the specifics,
but you might check it out if you haven't found a solution yet.