 \documentclass[00pt,a0paper]{article} \usepackage{tkz-graph}  \begin{document}  \begin{figure} \begin{tikzpicture}  \SetUpEdge[lw = 0.0pt, color = black, labelcolor = white] \GraphInit[vstyle=Classic]  \tikzset{VertexStyle/.append style = {minimum size = 0pt, inner sep = 0pt}}       \Vertices[unit=0]{circle}{a,b,c,d,e,f}  % It's easy to change the color of a vertex! \AddVertexColor{white}{a,d}  \Edges(a,b,c,d,e,f,a)  \end{tikzpicture} \end{figure}  \end{document}  