Rory...you picked a good one. How many different answers would you like? I have a few of them.
The Combat History of sPzAbt.503 is of no help, no color plates and no discussion of paint schemes at all....NEXT!
Tigers is Combat, (PB edition), page 163, shows 332 playing in the mud, dated Oct. 4th, 1943.....that should rule out overall Panzer Grey. There is also a nice shot of it on page 23 and page 165. On page 8 of TIC, it states; "In the Spring of 1943, the tanks (of sPzAbt. 503) were repainted a strange mixture of dark yellow-green-olive." Whatever that is.
Pages 47-48 of Tiger I on the Eastern Front has the same photos of 332 playing in the mud again. No camouflage is visible, at least that I can tell. A color plate of 333 is on page 49, it is overall dark yellow, with a considerable amount of dings, scratches, chips, dirt, etc. This matches well with a color plate of 333 on page 472 of Operation Citadel, (seen below) which is also in overall dark yellow with no additional camouflage colors. Or if they did, they have been washed away or so faded as to no longer be visible.
Looking at the B/W photos of 332 in the mud and judging by her closest sister 333, I'd go out on a limb here and say 332 probably looks an awful lot like 333 does at this time. Overall dark yellow, with the dings, dents, scratches and dirt that 333 shows.
My worth....