Taxi fare from Baiyun International Airport Holiday Inn at liwan district?

You have 8 people in a group, so I think you need to pay for two cabs. Generally speaking, the taxi fee from the airport to the hotel is about 130-140 RMB for one cab.
The shuttle bus line 5 is suggested. You can take the shuttle bus to reach Haizhu Plaza, where you can take two cabs to reach to your hotels. This way is much cheaper.