WORKING TO ADD MORE SIZES, THE REVISED PATTERN IS IN TESTING.

The front and back are knitted separately, bottoms up. The multi-color middle piece and the neck ribbing are knitted after the assembly. The sleeve ribbings are added in the end.
Because the back and forth rows are used the make the front and back, each row always starts with a slip stitch and ends with a purl stitch on the right and wrong sides.
You will also find that the instructions will ask you to make cables on the wrong side, which may be unusual, but I found it very convenient to separate the other patterns happening on the right side from needing to make cables at the same time. You still get a nice cable on the front side.

A row counter is needed.

The instructions are for the US sizes S, M and L. May work for size XL, but may not look like an oversize style garment. You can always use a bigger yarn and needle size and still follow the pattern for a larger size garment.
Width shoulder to should – 87 cm.
Length top to bottom – 58 cm.

The yarn I used:
Main color: Ice Yarns, Gray color 50g / 175m (30% mohair, 20% wool, 30% acrylic, 20% polyamide) – 160g.
Darker shade: Ice Yarns, tweed, 50g / 350m (50%wool, 10% viscose, 40% acrylic) – 10g.
White: unknown brand, 50g / 175m (30% mohair, 20% wool, 50% acrylic) – 10g.