Combine cauliflower, oil, coriander and salt in a large bowl; toss well to coat. Lightly coat air-fryer basket with cooking spray. Add the cauliflower to the basket (do not wipe the large bowl clean). Cook the cauliflower in the air fryer at 360°F for 10 minutes. Open the air fryer; lightly toss the cauliflower to redistribute. Continue cooking until golden brown and crispy around the edges, 8 to 12 minutes.