Hesse Graph
The Hesse graph is the term used in this work for the 21-vertex 35-edge Levi graph of the Hesse configuration.
See also
Hesse Configuration, Levi GraphExplore with Wolfram|Alpha
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References
House of Graphs. "Incidence Graph of the Affine Plane of Order 3." https://houseofgraphs.org/graphs/44164.Referenced on Wolfram|Alpha
Hesse GraphCite this as:
Weisstein, Eric W. "Hesse Graph." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/HesseGraph.html