Clusters are different kingdoms (can you guess which is which?), coloring applied by phylum.
4,452,270 taxa, made with Graphviz and Gephi Toolkit.
You're welcome. There are very few large graph visualizations out there in the web, because there is a lack of software tools for such stuff.
Make sure to check out LifeMap external url where it is available. Chosen taxon will be found in another tree-exploration tool, which is more fine-grained and is more suitable for exploring small branches and closest neighbors of chosen taxon in terms of hierarchy.