Use the following settings to create the Geico caveman;

Face
Eyes - Deep Blue
Facial Hair - Blackbeard (Color 1 - Brown, Color 2 - Brown)
Skin Tone - Fair
Physique - Normal
Height - Tallest
Hair - Goth Dreads (try to match the color of his beard)
Torso - The Wreckless One (Color 1 - Dark gray, Color 2 - White or gray)
Pants - Metal Head Basics (black)
Shoes - Slip-Ons

Accessories
Right arm - Fingerless (dark gray)
Left arm - Demo Wrap (dark gray)