Adding links to CSS Sprites

So I have added some CSS Sprites to my Scribe theme for social media images...but I do not know how to add links to the images (because it is one big file) to their respective social media links. Any help?

I added the sprites to help reduce the load time of my ever so slow and Upfront theme. My client is starting to get "angry" with me for not having the development go quicker when I am stuck trying to figure out how to make the site load faster.