Earth Signs( Virgo, Taurus, Capricorn)- They know one of the signs of lying is not staring at you, so they will forcefully stare at you. Tremors in their voice. They give too much detail. Can't stop their hands from moving.
Fire Signs( Aries, Sagittarius, Leo)- They're pretty much a natural at lying. Except they turn the lie into this big, obviously exaggerates, thing to make themselves look better. They say it so convincingly you believe them anyway. Might get into the story that they confess without noticing.
Water Signs( Scorpio, Cancer, Pisces)- Depending on the lie, they can be very convincing. If it's something that makes them feel guilty, they'll get really nervous and won't be able to look at your eyes for more than three seconds.
Air Signs( Libra, Aquarius, Gemini)- They're pros at lying. There is no way to find out the truth unless they tell you themselves.