No, expungement does not give you rights to have the internet purged of your conviction. Public records sites might be interested in updating their records to reflect the expungement, but any media that reported on the incident will probably decline to remove or modify their records. Internet caches will continue to show whatever was available online in the past.
And if you think that's not fair (which is a reasonable complaint) consider that at least you got a hearing: People defamed by law enforcement officialsPeople defamed by law enforcement officials who never even end up charged with a crime can have their lives ruined, generally with no recourse.
