There are many ways in which you can return abroad after graduation, whether as an English-language teacher, as a volunteer through an organization like the Peace Corps, of even through an international work placement.
However, finding the right opportunity for you takes time and research -- and the sooner you begin thinking about the process, the better off you will be.
These pages provide some information that may assist you. Please note, however, that we do not endorse any particular programs. The links offered here are merely informational and it is your responsibility to carefully research and review any post-graduation program before participating in it.