Taken by pioneer photographer Léon Gimpel, the process used was called Autochrome Lumière, and is occasionally mistaken for a 'colourising' process, but it is a genuine original colour image. Some of Gimpel's wartime photographs are seen in the AWM website here and some more on a French Great War photography website here (also yet more, including other pre-Great War shots here).
The Flight caption to their front page of the contemporary issue, although from a slightly different spot, identifies the machines in order. It said:
General view of the centre of the Grand Palais, showing the "Stands of Honour." In the middle, immediately under the spherical gas-bag, is the famous Bleriot cross-Channel machine. To its right is the "Rep" monoplane, in the extreme right foreground is the Farman biplane, to the left a French-made Wright flyer, and continuing round to the left the machines are respectively an Antoinette, a Voisin, and another Bleriot. The decorated spherical balloon in the distance is the Montgolfier.Please send earlier colour photographs to the usual address. The shot above, although widely reproduced I originally found here.