So the first thing that you need to do, is to go to work and figure out if you have a filing cabinet assigned to you or not. If you don't have one assigned to you, you should drop the whole idea and move on.
However, if you have one assigned to you, then you need to go on and take action. Go ahead and look at the cabinet for a while think of all the things that you can do with it. Chances are, you will come to the conclusion which would state that you should cover the whole thing with some cool cloth, or paint/draw on it.
Now if you decided that you want to cover it with a cloth or something like that, you need to go ahead and take measurements of the whole thing. Make sure you measure it properly and then go on and buy the appropriate cloth and cover the cabinet with it.
Alternatively, if you choose to draw on the cabinet, you can do so as you please. You can choose to use the office supplies, or bring in equipment to help you do this from home.
However, you need to ensure that you don't make a mess or end up destroying other objects in the office, since that could cause a problem for you later on.
You also want to make sure that the office has given you permission to go on and add modifications to your cabinet, or you could end up having quite a few problems later on.