Like everything else, maps are becoming just too damn interactive and option-overstuffed for someone like me to figure them out. Here is a simple old-fashioned .gif map from seemingly abandoned www.wtr.ru. Click on the image and it will appear large and readable.
Do take care to understand the layout of the system. Unlike you westerners, who think their cities in terms of ends and neighbourhoods, we Muscovites and Russians in general tend to arrange our geography along roads, rivers or, in this case, subway lines. A true Muscovite will not tell you “I live in Izmailovo” but “I’m at Metro Izmailovskaya, blue lines, 100 meteres from the station”. It took me a while to understand that distances and directions are secondary. “It is east side of Prospekt Mira, a couple of miles north from Sukharevka” is not universally understood. “Orange line to Rizhskaya, first carriage and to the right” is how a typical Metro-oriented Muscovite would say it. SO GET FAMILIAR WITH THIS MAP!!