Unfortunately the Hibernate file will be huge if you have 32GB of RAM, as it needs to be big enough to dump the entire contents of your RAM in order for the hibernate function to work. If you don't use the hibernate function, you're best off disabling it altogether. Quickest way to do that is to run a command prompt as administrator, and then type in:
powercfg -h off
That will disable hibernate and delete the hiberfil.sys file.
To change the size of the page file, you open the start menu, right click on computer, and click properties. Then on the left click on advanced system settings, under the advanced tab click the settings button next to performance settings, that will open another window. In that window go to the advanced tab and click the change button under virtual memory to change the size of your page file.