There is. However, it's pretty reliant on cooldown-based trades. Riven is pretty tough to deal with as a Darius, but if you wait until she blows her abilities, then E, W, Q her, she should be helpless for long enough for you to give her back some damage. If you have ult, you might even be able to kill her before she gets away.
Your other option is to just sit back and let her push you in. Farm under turret, using the fact that your W cooldown and mana cost are halved if you kill a unit with it to last hit. She's a lane phase champion, meaning that, if you don't let her get fed, she won't be able to do much mid and late game. Darius, on the other hand, can build tanky and thrive in the teamfight phases of the game when played well. If she tries to dive you, you should be too tanky for her to handle, unless she's already fed. Also, I recommend running Courage, since your E will proc it, instead of Grasp. Courage is just better, especially on Darius, who can cc someone and then they still have nearly the full shield duration to try to get through it.
Obviously, the third option is hoping you get camped so you can get fed against her, but honestly that's unreliable. It's just better for a jungler to get a mid laner or an ADC snowballing than Darius, especially considering that ganking top lane puts you at threat of losing Dragon.