There is as yet no direct easy to root Fonepad RAW 3.2.5.
Because the RAW is not yet available om the ASUS website.
Once it is available there, it can be Rooted, and made available.
… there is a work-around: Install RAW 3.2.4 instead.
And then follow the upgrade procedure described by frazier:
Then you can upgrade to version 3.2.5 with SuperUser access.