There is a taxi rank 2 mins walk from the hotel entrance. It us easier to ask the drivers to take you to Ferrari World as they seem to get confused as to where they are going if you ask to go to the circuit.
You can then get the shuttle bus that runs from just up the road from Ferrari World to get you to your grandstand. These are free and go round the circuit road.
Don’t go back to Ferrari World though for the return as all the taxis are diverted to the taxi point which is well signposted. Be patient on return though as it is very busy just after the race and concerts.
There is a bus but we have only ever done this once as we still had to get a taxi to/from the bus stop plus not really clear at the circuit where you catch them from.
Final option, but also expensive, and which the concierge at the hotel can arrange, is a car and driver. The downside is you have to have them for the day (think it is 12 hrs) but means you can come and go as you please.