What on earth do diagrams have to do with trust in docs? Docs that are useful, accurate, and up to date would increase trust.
For example, I ended up writing this to integrate diagrams and Sphinx. https://github.com/j-martin/sphinx-diagrams
Similarly there's https://pypi.org/project/sphinxcontrib-plantuml/ and https://mermaid-js.github.io/mermaid/#/ (among other similar tools).