Since Google's main page serves the newest version, you should look for the Chrome Enterprise standalone installer or verified legacy repositories.
Before downloading, you may need to adjust Internet Explorer's strict security settings, which often block downloads on Windows Server. Open . google chrome download for windows server 2008 64 bit
Windows Server 2008 (non-R2) is restricted to an even older version, Chrome 49. How to Download and Install Chrome on Server 2008 R2 Since Google's main page serves the newest version,