The word “take” often indicates movement away from the 'speaker', while “bring” indicates movement toward the 'speaker'.
She was invited to be a 'guest speaker' [=to give a speech] at the conference.
Senator Williams was the 'keynote speaker' at the convention.
(..) he was looking at you when he said the next Bill Gates could be right in this room. I doubt it. And I showed up late. I don't even know who the speaker was. It was Bill Gates. Shit, that makes sense. All right. Thanks, guys. ' Are you a moron? ' Are you medically stupid? (..)2010 The Social Network