I have used the pre-defined "Sourcefire FireSIGHT Report: $<Customer Name>" Report template for most of my POC's. This gives good detail with surprisingly decent graphics, making it readable for execs and management. Only information you need to add is Customer Name and sensitive Network.
If you are looking specifically for POC reports, Firepower 6.1 has inbuilt Risk Report Templates (Network, Attack and Malware) that can also be used for executive communication.