Short/tl;dr version:
Walk South and just ask people directions.

In Depth Instructions:
After retrieving whatever luggage you have stored in the bus undercarriage, walk in the direction the bus is facing a few meters, and you will come to a T in the road. across the street you should see a building with a live tree growing out of it. Take a left, and walk until you reach another T in the road. Across the street you should see a police station. Take a right, and walk down the hill until you reach another T in the road. To your left you will see a big brown sign with directions to various places in the area. Take a right, and walk towards that big blue silo thing on your right. We are located across the street from the silo on your left.