In order to create an Org Chart for your Client, access the record - click Clients > search for the Client record > click the Client Name.
Click Contacts to see which contacts are associated to the Client Record.
Click Open Org Chart
You'll then see all Contact records and have the ability to drag and drop to show who reports to who.
Click Save when finished. If a contact's Company name is changed or if a different manager is assigned, the Org Chart will update automatically.