Graphviz — Circular (circo)
circo layout — circular embedding, good for state machines or ring topologies.
Rendering…
Make it your own.
digraph G {
layout=circo;
node [shape=doublecircle, style="filled", fillcolor="#fde68a"];
A -> B -> C -> D -> E -> F -> G -> H -> A;
A -> C; B -> D; C -> E; D -> F; E -> G; F -> H;
}