As far as I recall there is no wrinkles or age slider in Skyrim. Perhaps give them a lighter skin tone and minimal amount of dirt.
Nope. http://cloud.steampowered.com/ugc/630730981978418724/2DB8F86FDCE249340253813F19B42B3EB52C92AC/ was the best I could ever do with the vanilla skins with my Breton mage. She certainly didn't look
ancient, but not as young as I'd pictured the character, either. It's the wrinkles in the forehead and the lines around the mouth that do it.
At least since I'm on the PC I could drop a texture mod in to take care of that.