January Jones plays prim Betty Draper on “Mad Men,” but off screen she’s not as ladylike as you’d imagine, she tells W’s Lynn Hirschberg in a cover story coming out Monday. “I’m really like a guy in a lot of ways,” Jones reveals. “My screen saver is a picture of me with Eli and Peyton Manning taken at the Kentucky Derby.” The South Dakota native also recalls what it was like to move to New York as a “naive” 18-year-old who wanted to be “rich and famous,” only to realize “there were a billion girls . . . who wanted to be models.” The W piece on Jones, who next appears in “X-Men: First Class,” accompanies a steamy photo spread by Craig McDean.