1. A method comprising: obtaining graph data including information related to a plurality of nodes; the plurality of nodes corresponding to search queries performed on a host site; constructing a sub-graph of additional nodes that represent search results of the search queries, the constructing of the sub-graph including generating links between the additional nodes based on an amount of overlap among the search results produced from the search queries that correspond to the one or more of the plurality of nodes, the additional nodes included in the sub-graph being clusters of the search results; rendering a graph by displaying each node at a respective absolute position within the graph and generating a plurality of tiles that depict images of the sub-graph at each of a plurality of zoom levels; and displaying a sub-graph image corresponding to a selected position and zoom level.