It depends on the variant. Some s5 have it others don't. To answer your question, there is a way to do it with root looking identical to stock. Without root you can use an app like notification toggles from the play store. My note 3 has it, so it is duplicate, but this is what it looks like. I know this is for the s5,but notification toggles should work for it as well.
dpham00, Android Central Moderator
Sent from my Verizon Samsung Galaxy Note 3