I think the older Generation then switches more to the GOP. Younger people are always/in most cases more liberal.
Not really. Older people now are more conservative because the times they grew up in were led by successful conservative leaders. People were grew up under FDR voted more Democratic their entire life, and kids who were up under Clinton's 2nd term and Bush/Obama have already been voting consistently more Democratic. The Silent Generation under Eisenhower has always been more conservative. People who grew up under Reagan have always voted more heavily Republican. Even Reagan got upwards of 60% of the youth vote in 1984.
http://www.people-press.org/2011/11/03/section-1-how-generations-have-changed/
http://www.people-press.org/2011/11/03/section-2-generations-and-the-2012-election/
Simply put, maybe it seems like people "turn conservative" as they age, but if this was the 1950s, people would be saying the youth is "always more Republican" and that when they age, they turn "more liberal", because a bulk of the older people were Democratic and a lot were New Dealers.
There has been research that once generation votes for the same party 3 times in a row, they lock-in their support to that party for the rest of their lives (barring massive wave elections). Also just a gut feeling, but I imagine this whole Trump phenomenon isn't helping the GOP with future voters.