From the description of this item on ArcGIS Online:
"This is a diagram generated automatically by a Python script that inspects the contents of the arcpy library as it is shipped with ArcGIS 10.1. It will not ever be an officially supported or maintained document, please refer to the ArcGIS 10.1 online help for an accurate, timely source of reference."
Like I said in the comments before: The script wouldn't be particularly useful; it assembles the diagram by copying data from a variety of internal Esri sources that aren't available outside of our internal network.
The link in your 11/19/2013 post regarding an object model diagram no longer works and the attachment to the 6/10/14 post says 10.2.1 on the bottom. (AND IS EXTREMELY SMALL PRINT!!!) I really need the 10.1 version if you still have it. Thanks