For my final version of an image edited in Photoshop I decided to go with black and white colors to bring more attention to composition and lightning, as the prevailing red color from the original shot was mostly distractive. To do that I applied a "Channel Mixer" adjustment layer, chose "Monochrome" option and applied my custom preset with a total of 100%. My next step was a correction of black and white colors, which was done through the "Levels" adjustment layer. The original photo has a light reflection on the walls, which gives a nice contrast look for the black and white color option. To enhance this detail even more, I used a "Dodge Tool" to paint over enlightened zones on a new layer with "Overlay" and 50% opacity. Another adjustment was done with a "Curves" adjustment layer, using a traditional S-curve to make the contrast even stronger. Additionally I checked how well does composition positioned towards a Golden Ratio layout, and cropped it to get a better fitting. Final version is printed on a matte photograph paper.
This image is a part of my photo triptych with people looking up at the sky: