If you find that the marble surface you cleaned a few days ago has discolored, you could try this to get back the shine. First, check to see whether the discoloration is rough and dull. Then check all the grout and caulk lines to check for any water seepage. The discoloration might be a form of efflorescence.
While not very usual, it is a possibility. Allow the floor to dry for a few weeks. After it dries completely, use a mildew stain remover for natural stone products. Scrub the surface with it thoroughly. If some discoloration persists, poultice it with the same mildew stain remover. Then, figure out how the water got under the tiles and solve that issue. Marble Floor Polishing Miami could provide further assistance.