Here's a really good article with more visualization of the differences. You can see how the Silent generation stayed a little longer, but the Boomers started in the Senate earlier and basically still push out GenX ... which got a late start and still are underrepresented. Even Millennials are on the board now. It took ten years between Silent and Boomers being represented. It's sixteen years more before GenX is represented... and only five before Millennials are starting to show up in the Senate. GenX is the 42-57 year olds that just are wiped off the board.

https://blog.datawrapper.de/age-of-us-senators-charts/