As with An, Enlil is sitting on a throne with a staff of office. On his head is a helmet with six horns done in the traditional Sumerian style. I gave Enlil Black hair because this should be present on almost all Sumerian images.
Enlil is a god of heaven, but more specifically he is a god of the air, the lower heaven. For this reason I placed a cloud behind him.
The name d|Enlil is traditional, but there is something lost in translation. The Sumerians wrote a single symbol before the names of the gods to denote their holy status. This symbol was not pronounced when one said the name. It was just there as an identifier. When translated into English it became tradition to place a lower case d and a line before the name.
It is important to note however that in traditional Sumerian representations one draws power from that which one stands on. For this reason Enlil might be better depicted with his throne sitting on the clouds. He is drawn this way mainly to differentiate him from An who has similar Iconography.
The seven star pattern is associated with Enlil because he is the head of the council of seven gods who decree fate, and by extension the rest of the pantheon. I chose to place one star under Enlil to differentiate him from An. Enlil is the lord of the hosts of heaven, and so the single star is his foundation.
The seven star pattern is obviously both a celestial and a holy symbol. The seven stars in this pattern represent the seven who decree fate. Stars in an asterisk like form are also traditional symbols of divinity. The dingir symbol itself is even a stylized star.