Hello. That example uses the radio_queue library, which does not implement any kind of power saving. The radio_queue library is capable of receiving and sending, so after the packet is sent it puts the radio back into RX mode, which will consume current.
In addition to the link that Jim gave, here is another useful one:
You might want to turn off the radio and also put the CPU to sleep. You will probably have to read the CC2511F32 datasheet to get a better understanding of the sleep modes and how to wake it up from sleep after an hour.