Well, it really depends how you want to look at it. ;)
You could just write the raw hex string to a file, then look at the file in a hex editor. :o
It seems you want ASCII formatted text showing each double octet with 4 digits (0...F), followed by a space. If your string always contains an even number of digits, you could just cast it as U16. This would simplify the code a bit. See attached modification of Darren's example (LabVIEW 7.1).