With the following snippet:
\begin{tikzcd}[row sep=1.5cm, every arrow/.append style = {dash}]
& H_5 = S_3 & \\
H_1 \arrow[ur] & H_2 \arrow[u] & H_3 \arrow[ul] & H_4 \arrow[ull] \\
& \arrow[ul] \arrow[u] \arrow[ur] \arrow[urr] H_0 &
\end{tikzcd}
I get:
I'd like the top and bottom entries (i.e. $H_0$ and $H_5 = S_3$) to be positioned so that they are equidistant to $H_2$ and $H_3$ below them, rather than being shifted over to the left. I thought that using one fewer column in the top and bottom row would do the trick, but evidently not.
What is the right way to achieve this?