There is no God called Zaziel; the concept of 'Planetary Spirits' is a distorted interpretation presented by j*ws. Zaziel is actually a different pronunciation of Azazel. In the Power Ritual of Azazel, we also call him 'Zazil.' In Semitic languages, the letter E is pronounced between E and I. Therefore, the pronunciation of Zaziel would be 'Zazil' or 'Zazel'.
His Sigil is also connected with Saturn deeply. You can take Saturn Square, draw lines and get Seal of Saturn; aka Sigil of Azazel:
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Azazel is Planetary Spirit of Saturn.