The placing of the stars is as close as I could get them to the Actual cluster, the Pleiades (also known as the seven sisters). The game actually only takes place within this cluster, with a larger focus on the systems and how they relate to one another.
I see where you are going with this. It IS hard to convey a three dimensional map on a single plane, but rather than focus on the science and math behind calculating how to best represent their locations, I feel like a simple map is best. Which is why I went for the Portolan style chart.