This moon is shining by the light of its planet. Specifically, a large portion of Enceladus pictured above is illuminated primarily by sunlight first reflected from the planet Saturn.
The result is that the normally snow-white moon appears in the gold color of Saturn’s cloud tops. As most of the illumination comes from the image left, a labyrinth of ridges throws notable shadows just to the right of the image center, while the kilometer-deep canyon Labtayt Sulci is visible just below.
The bright thin crescent on the far right is the only part of Enceladus directly lit by the Sun.
Cassini spacecraft has capture this image during a close pass by by the enigmatic moon.