As you can see in the picture, the Mondasian Cybermen wear mylar skin and have human hands.
While they’re of the no-frills variety, there is a canon reason for why the Mondasian Cybermen look different than their modern descendants.
This is because they are still part-human and have not fully developed the conversion process for becoming wholly cyber.
For starters, the Mondasian Cybermen hail from the planet Mondas, which is described in the lore as a planet similar to Earth, and the Mondasians were once human-like, but were forced to undergo cyber transformation after their planet drifted into the outer solar system.