Very nice. I really like the colorization, particularly the vase and the flowers in it. Seems like they would have chosen flowers that looked a bit nicer, those look like they just died (or are about too). Looks more like wheat than flowers actually.
Just a note. This is technically a post war image. Grant is wearing the rank of 4 stars which he wore between July 25, 1866 - March 4, 1869 (when he became President). Interestingly that means that during the entire election and his period as President-elect he was also serving as "General of the Armies".
After becoming President Sherman was the next to assume the rank. In 1872 he changed the insignia from four stars to two with the U.S. coat of arms between the stars. Sherman retired in February of 1884 and the rank went vacant until Congress promoted Sheridan (who was in ill health) in June of 1888. He restored the 4 star insignia that Grant had used. When Sherman died in August of 1888 the rank was again abolished and did not return until 1917 with the U.S. entering WWI.
In 1924 (following Pershing's retirement) the rank was again vacant until 1929 when General Summerall was promoted when he retired the following year MacArthur was the 8th person promoted to the rank. There has been at least one four star General in the U.S. army ever since. As of this date there have been a total of 212 people to hold the rank of 4 star General (including a few posthumous).
Amazing that it took 64 years (Grant in 1866 to MacArthur in 1930) to get to #8 and we have had 204 more in the last 84 years since 1930!