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\begin{tikzpicture}[
scale=1.5,
dot/.style={circle,draw=black,inner sep=3pt},
center/.style={circle,fill=black,inner sep=4pt},
arrow/.style={thick,->,>=stealth}
]
\node[dot,label=below left:\(\xi_3\)] at (0,0){ };
\node[dot,label=below:\(\xi_4\)] at (1,0){ };
\node[dot,label=below right:\(\xi_5\)] at (2,0){ };
\node[dot,label=left:\(\xi_2\)] at (0,1){ };
\node[center] at (1,1){ };
\node[dot,label=right:\(\xi_6\)] at (2,1){ };
\node[dot,label=above left:\(\xi_1\)] at (0,2){ };
\node[dot,label=above:\(\xi_8\)] at (1,2){ };
\node[dot,label=above right:\(\xi_7\)] at (2,2){ };
\draw[arrow] (1.0,1.2) -- (1.0,1.8);
\draw[arrow] (1.2,1.0) -- (1.8,1.0);
\draw[arrow] (1.0,0.8) -- (1.0,0.2);
\draw[arrow] (0.8,1.0) -- (0.2,1.0);
\draw[arrow] (1.2,1.2) -- (1.8,1.8);
\draw[arrow] (1.2,0.8) -- (1.8,0.2);
\draw[arrow] (0.8,0.8) -- (0.2,0.2);
\draw[arrow] (0.8,1.2) -- (0.2,1.8);
\end{tikzpicture}
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