Gentle Swaying:
* Swaying like a willow in the breeze.
* Swaying like a dancer on a cloud.
* Swaying like a feather in the wind.
* Swaying like a pendulum in slow motion.
* Swaying like a ship on calm seas.
* Swaying like a flower in a gentle rain.
More Dramatic Swaying:
* Swaying like a tree in a hurricane.
* Swaying like a drunkard on unsteady legs.
* Swaying like a ship caught in a storm.
* Swaying like a vine in a torrential downpour.
* Swaying like a building about to collapse.
Figurative Swaying:
* Swaying like a melody on the air.
* Swaying like a thought in your mind.
* Swaying like a belief on the edge of doubt.
The best simile for you will depend on the specific context and the type of swaying you want to describe.