Travellers to Granada pick up the Alsina Graells bus seen in the picture from the stop where the Malaga Airport to Marbella shuttle bus and the L19 service to Malaga bus station leave from, just outside Arrivals across the big covered meeting area.
In the top part of the picture you will see the moving walkway which takes passengers to the Malaga airport train stop.
The Malaga Airport to Granada service runs twice a day 7 days a week. See timetable below:
Depart: Malaga Airport: 11.30 Arrive: Granada Bus Station 13.15 Cost: €9.35
Depart: Malaga Airport: 18.30 Arrive: Granada Bus Station 20.50 Cost: €9.35
If the timetable above doesn't suit you, then check through to the Costa del Sol bus page and look at the Malaga Bus Station timetable for other buses to Granada. The L19 service every 30minutes will take you from the airport to Malaga Bus Station and from there you can book your onward bus to Granada.