\begin{figure}[H]
  \[
    \begin{pmatrix}
  0 & 1 & 1 & 0 & 0 & 0 & 0 & 1 \\
  1 & 0 & 1 & 0 & 0 & 1 & 0 & 0 \\
  1 & 1 & 0 & 1 & 0 & 0 & 0 & 0 \\
  0 & 0 & 1 & 0 & 1 & 1 & 1 & 0 \\
  0 & 0 & 0 & 1 & 0 & 0 & 0 & 0 \\
  0 & 1 & 0 & 1 & 0 & 0 & 1 & 0 \\
  0 & 0 & 0 & 1 & 0 & 1 & 0 & 0 \\
  1 & 0 & 0 & 0 & 0 & 0 & 0 & 0 \\
\end{pmatrix}
  \]
\end{figure}