Palm Springs Cactus

Hi there,
I was wondering if you could help to identify this cactus. I saw it while walking down a street of mid-century homes while visiting Palm Springs. I love its color and form, really got my attention. I live on the east coast and would love to care for a (much) smaller plant of this type indoors, if you happen to know any specifics.
Thanks for your time!
Nicole
The cactus is a Myrtillocactus, also known as the Whortleberry Cactus.
Peter