Mupad: how to use cycles

I have:

G := Dom::SymmetricGroup(7)

a:=G([2,4,6,1,3,5,7])

For instance: _mult(_invert(a),a) gives [1,2,3,4,5,6,7]. Exact!

But I cannot understand how to represent a as cycles: cycles(a) give cycles([2,4,6,1,3,5,7]). Sure!

The same for order, size, ...