Ebb - I'm using GIMP for the imagery. As to the 'how', it isn't really hard, with a couple lil tricks, and a good image manipulation application:
1) Opened your/a photo image in GIMP. Added a transparent "Layer" on top of the image, and a second plain white Layer behind/below it. You can turn the visibility of any particular Layer on or off, whenever you want.
2) So the top Layer, imagine it as a sheet of clear acetate to draw on, with your photo as guidance. I drew on the outlines, and once I had them done,
3) I turned off visibility of that middle, photo Layer. That leaves just the clear top layer with some colored lines, showing against the white bottom Layer (...the only point in having the bottom, plain white Layer is to make it very easy to see the top Layer lines, when I have the photo 'invisible'). The colored lines have defined the 'cushion' shapes against the white background below.
4) Then, still on the top Layer, I selected the shapes inside the lines, and filled them in with color.
5) and, last - made your photo Layer visible again before saving. That's all it takes!
So, if I got it right with the extra area, your salon-as-a-bed will look like this, then: