Drag the probe point: its image is always on the far side of the sulfur, at the same distance. Step 4 of 18 of the symmetry tutorial, worked in a live 3D view.
Molecular point groups with their operations and character tables, the 230 space groups with a cell builder, and the 17 wallpaper and 7 frieze groups drawn live. The tool needs JavaScript, and WebGL2 for the 3D views; these are the pages it offers: