K16

\documentclass[border=0.1cm]{standalone}
\usepackage{xcolor}
\usepackage{graphics, graphicx}
\usepackage{tikz, tkz-graph}
\usepackage{pgf, pgfplots}
\usepackage{graphviz, tkz-berge}
\usepackage{graphics, graphicx}
\usepackage{pstricks, pst-node, pst-tree}

\usetikzlibrary{arrows, petri, topaths}
\usetikzlibrary{shapes}
\usetikzlibrary{arrows.meta}
\usetikzlibrary{positioning,automata}



\begin{document}
		\begin{tikzpicture}[transform shape,line width=0.2pt]
			\foreach \x in {1,...,16}{%
				\pgfmathparse{(\x-1)*45+floor(\x/9)*22.5}
				\node[draw,circle,inner sep=0.25cm] (N-\x) at (\pgfmathresult:5.4cm) [thick] {};
			} 
			\foreach \x [count=\xi from 1] in {2,...,16}{%
				\foreach \y in {\x,...,16}{%
					\path (N-\xi) edge[-] (N-\y);
				}
			}
		\end{tikzpicture}

\end{document}