In graph theory, models and drawings often consists mostly of vertices, edges, and labels. So, it may be possible, to use a simpler language for generating a diagram of a graph.

The tkz-graph package offers a convenient interface.

The code is fully explained in the LaTeX Cookbook, Chapter 11, Science and Technology, Application in graph theory.

% Drawing a graph % Author: Stefan Kottwitz % https://www.packtpub.com/hardware-and-creative/latex-cookbook \documentclass[border=10pt]{standalone} \usepackage{tkz-graph} \GraphInit[vstyle = Shade] \tikzset{ LabelStyle/.style = { rectangle, rounded corners, draw, minimum width = 2em, fill = yellow!50, text = red, font = \bfseries }, VertexStyle/.append style = { inner sep=5pt, font = \Large\bfseries}, EdgeStyle/.append style = {->, bend left} } \thispagestyle{empty} \begin{document} \begin{tikzpicture} \SetGraphUnit{5} \Vertex{B} \WE(B){A} \EA(B){C} \Edge[label = 1](A)(B) \Edge[label = 2](B)(C) \Edge[label = 3](C)(B) \Edge[label = 4](B)(A) \Loop[dist = 4cm, dir = NO, label = 5](A.west) \Loop[dist = 4cm, dir = SO, label = 6](C.east) \tikzset{EdgeStyle/.append style = {bend left = 50}} \Edge[label = 7](A)(C) \Edge[label = 8](C)(A) \end{tikzpicture} \end{document}

Open in Overleaf: graph.tex