If the pattern’s on Ravelry, it’s not tagged in a way I can find it.
I’d just take a basic cardigan pattern with a fit I liked and a similar gauge, and rewrite it to include the cables. Somebody correct me if I’m interpreting this wrong; it looks like one type of cable is used for the hem, button band, collar and cuffs in place of the usual ribbing, as well as for the length of the sweater. I’m thinking it’s a wide, open single twist cable–anybody else know what cable that is?
The large open diamonds have bobbles worked into the centers and then a column of knit stitches coming up from each of the top row of bobbles, gradually traveling toward the center of the diamond point as they ascend, and then the diamonds narrow into a single-twist cable as they approach the neckline. That should all be fairly simple to create a chart for. If your friend’s in love with the look, she’ll probably have to create her own pattern.