It says on the The Organizations REST API page for Pagination

The Organizations REST API uses pagination to conserve server resources and limit response size. If there are more results available after the current page, a link to the next page of results is included in the JSON. You can use the cursor parameter to set a specific starting point for the results.

The links.next and meta.next should include the from, to and action parameters in the Audit Log API. 

Currently these need to be manually added to the following GET request to ensure the correct values are returned in the payload.