The recommended way for Blue teams and Purple teams is to read the analysis performed automatically by PurplePanda with the param -d and once some interesting data is found, analyze it in depth with the graphs.
Red Teams should also take a look to those analysis and then focus on the graphs on how to escalate privileges from the compromised users.
As indicated in the main Readme, it's recommended to download Neo4jDesktop.
This tool allows you to run a Neo4j database locally where you can store all the data gathered by PurplePanda, and it also contains the tool Neo4jBloom to visualize graphs.
In this tool you can save queries, run them and inspect the results and that is the way in investigate the gathered data in depth.
Each folder inside /intel defines one platform that can be enumerated and contains a HOW_TO_USE.md file and a QUERIES.md file with queries to run inside Neo4jBloom to inspect the data.