The Collaborative International Dictionary of English v.0.48:

Liveryman \Liv"er*y*man\, n.; pl. Liverymen.
   1. One who wears a livery, as a servant.
      [1913 Webster]

   2. A freeman of the city, in London, who, having paid certain
      fees, is entitled to wear the distinguishing dress or
      livery of the company, guild, or district to which he
      belongs, and also to enjoy certain other privileges, as
      the right of voting in an election for the lord mayor,
      sheriffs, chamberlain, etc.
      [1913 Webster]

   3. One who keeps a livery stable.
      [1913 Webster]

WordNet (r) 3.0 (2006):

liveryman
    n 1: a worker in a livery stable