Is there any tool to visualize the bitcoin transaction graphs? I want to visualize the bitcoin transaction graph linked to addresses that could potentially link my addresses and to better chose which coins I would use for which payment to prevent loosing privacy. Is there any tool that could help me build that graph and visualize the clusters that could be formed?
Check out KYCP.org. They have good visual and written explanations of heuristics used by chain analysis companies, such as common-input, round numbers and change outputs, and address reuse.

OXT.me is also a good website. I think they're related in some way, but provide slightly different visualizations and heuristics.