Well, since you didn't describe what way you DO cast on, I'm assuming that it's the long tail method. If so, yes, cable cast-on is different. You use two needles. I'm sure you can find instruction for the method if you google 'cable cast-on'.
I imagine that the reason they suggested it is that they want the cuff to be plenty stretchy. The same is true for the cuff of socks, so what I usually do is the 'normal' cast-on (long-tail), but I cast onto a needle 2 to 3 sizes up from the needle with which I am going to knit the cuff. You then transfer those stitches to the needles that you are going to use for knitting the cuff. (Be careful, they're going to want to slide off of your needles until you knit them once. )This method usually gives me enough extra stretch.
I hate cable cast-on, but I know that there are lots of alternatives out there. You could also google 'stretchy cast-on'.