I got the response for @microsoft.graph.downloadUrl . and got a download URL look like the one below.
https://developertcs.sharepoint.com/sites/test/_layouts/15/download.aspx?UniqueId=528531ac-15ac-4add-976a-056b2a16cb8e&Translate=false&tempauth=eyJ0eXAiOiJKV1QiLCJhbGciOiJub25lIn0.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.MnVvbmZBcGpiRURWTS9yOUl2MThrT0xkcnY0MFZGOEJ4dFZVZTZXY2lyYz0&ApiVersion=2.0
I am making Raw HTTP request of above url and getting 403 Forbidden as a response