Here's how I do it.
Start with a basic cyclohexane chair.
Draw the axial and equatorial bonds at atoms 1 and 3.
Insert ethyl groups at the two equatorial positions
And we have our structure.
Draw an arbitrary structure with both groups on wedges and assign configurations.
If any had been wrong, I would have interchanged the wedge and dash on that carbon.
Now we must draw the conformation.
This is also a cis-1,3-disubstituted cyclohexane, so we put the substituents in the equatorial positions.
Again, we have our structure.