We already have a runbook for this at the following URL.
https://support.ca.com/phpdocs/1/8231/runbooks/CASM-FacebookIDPFederationRunbook-ver1.pdf
Customers may find that more information would be helpful to successfully deploy their facebook oauth partnership.
So, here is a full step by step guide.
Step by Step: Facebook partnership
It shows you what are the prerequisites before you start the partnership configuration.
What you need to do at the facebook side.