If you google a request you will find numerous example sand approaches which will be helpful. My advice is, rather than a specific template, to start with the business rather than the template.
Determine the goal of the business as a whole, where it's market is on social media, and the resources available to manage social media channels. Have this in writing and it will be your frame work for implementing the template itself (which is, in effect, a series of tasks rather than a strategy).