Google Maps is certainly a good place to start.
For public transport in Switzerland, there is a specific map, called “Trafimage”.
Direct map link to Davos Platz
On the interactive map, you’ll find all stations (incl. bus/postbus). Click on the blue public transport icon for more information.
For questions about Davos, I recommend the tourist information. You may contact them by email, chatbot, WhatsApp, or by phone.
Have a great time in or around Davos!