The Pallindrome Scarf does have multiple cables but, as I'm discovering, there are other patterns for scarfs that are pallindromes...it's all in how the knits and purls are used. If it's the same on both sides it's a pallindrome. In this particular pattern the cable is made with K1, P1 x 3 to the cable needle held in back of work, K1, P1 x 3 on left needle, then work stitches on cable needle. With the Plymouth Encore Tweed the cable is nice and thick and shows up well in the black yarn. I have some Galway in red that I'm considering using for a pallindrome scarf for me...one of these days.
P.S. Check out Ravelry for "reversible cable scarf". There are lots of reversible patterns, some free, some not.