Get these free and printable examples of cluster diagrams in high definition! Cluster diagrams are a type of non-linear graphic organizer that can help to systematize the generation of ideas based upon a central topic. Just like its name, this diagram is used to represent some kind of cluster. A cluster in general is a group or bunch of several discrete items that are close to each other. The cluster diagram combines the information from each step in the planning process into one drawing that shows the cluster’s function and structure. The first example of the diagrams that you can print is posted below. It is called a ‘How to be a Construction Contractor’ cluster diagram.