Since 1922, he studied at the prestigious "Académie Julian" in Paris, where ,about 30 years ago, Henri Matisse has also been a student. For several years, Cavaillès shares a studio with his friend and fellow artist Roger Limouse in Paris. Early in his career he studied the old masters in the Louvre.
In 1936 Cavaillès receives a grant from the Fondation Blumenthal, whereupon he gets more and more attention from the audience: On the occasion of the "Exposition Internationale des Arts et Métiers" in 1937, he was commissioned to create elaborate decorations for the pavilion of Languedoc. In the same year Cavaillès makes his first solo exhibition in the "Galerie Druet" in Paris.
In 1938 he became a professor at the "École Nationale des Arts Décoratifs". After the end of World War II Cavaillès works at the "Musée des Augustins" in Toulouse, but soon resumes to his teaching job as a professor in Paris.
In 1948, the artist is exhibited at the Biennale in Venice. Since 1937, he exhibits his works internationally: in addition to France (Paris, Nice), he is also shown in Finland (Helsinki), England (London), Germany (Cologne) and the USA (New York).
His colorful and expressive images characterize his entire œuvre. Cavaillès belongs to the artists group "La Réalité Poétique".