Contact your webhost. Unless you've set up your own server and are using that, you have to ask your webhost to redirect the IP for you.
In which, as @Su' said, you'll have to get your own dedicated IP (Which is probably going to cost more). IPs and URLs aren't synonymous. They are two different entities that are tied together using a server configuration (an A Record).
Situation a): You don't own the IP
Use the contact page on GoDaddy to get customer service and request a dedicated IP (it will cost extra), then have the IP attached to your domain name.
Situation b): You do own the IP
Use the contact page on GoDaddy to get customer service and request that your IP be attached to your domain.
There aren't a whole lot of situations to do this, most people are used to and prefer a domain over an IP. Unless you're creating some kind of external webapp, the extra cost and effort to do this isn't worth it. In the modern world, IP addresses come and go.