How to turn my Canon PowerShot S3 IS into a better birding camera

I am totally clueless...I have always loved what my camera has brought to the table so to speak. But have taken up birding and would like sharper images.

Can this be accomplished on my current camera? What do I need to purchase to accomplish this if it can be done?

All answers are appreciated. Thank you for taking the time to give my post a minute of your time.