How long has she been 3? Because if she is getting closer to 4, you might be able to reason with her about it. You might be able to explain that she has had your attention all day, and the others need some, too. It isn't nice for her to act like that everyday. How would she feel if they did that to her? Maybe you can help her brainstorm some solutions of things she can do so they can have some time with you, too. Maybe, it can be her job to fill their cups for snack time, or get the food from the fridge. Or something else so she feels included.
Or, maybe it's her time of day for a bit of "quiet time" with book on the couch.
Can you start a "get ready for the big kids" routine 15 minutes or so before they get home. She can help you set the table, get out UNO or some game to play all together. Maybe start a more formal "show and tell" every afternoon where everyone gets their few minutes to tell about their day? She can sit on your lap while the others take their turn. And, of course, it will buy you a few minutes while she looks for the paper she colored, or gets her nicely made bed straightened for showing off.
And...I'd be tempted to explain to the older ones, too. I'd have THEM help me make it a fun time for the littlest, and then make it worth their while by putting her to bed earlier and focusing on just them.