See the way that the "faces" are oriented?
The orientation of the faces and the interaction with other particles with the same/different orientation, is electromagnetism.
The overlap in the middle represents the handedness involved in particle decay, and more clearly seen in my drawing of the neutron, the tendency that the knots have to untie themselves, which is the Weak force.
The sharp folds at the end of the lobes is a "quark", and the lengths between the "quarks" represent the "gluons", though those are just approximations of the spacetime topography/chemistry in my model.
The length of the folded lobes is hard to properly represent in a drawing, but it is literally folded distance, knotted space. As such, they distort the local fabric of space around them, stretching it. This is equivalent to the stress energy tensor of GR.