As described in one of the previous post How to get dead lock error details in SQL management studio the extended event corresponding to “xml_deadlock_report” will open the file in XML format.
Save this XML format file locally.
Now in SQL management studio, open the above saved file with .xml extension and save it as .XDL extension.
Now in SQL management studio, open the file with .xdl extension.
Viola you will see the deadlock report in graphical format.