It might be a typo in the site, infocenter.arm.com/.../index.jsp.
It should be 64KB (not 32KB) based on the picture.
> Index (# of lines): 2^8
> # of Words per line: 2^4
> # of Bytes per word: 2^2
> 2^8*2^4*2^2 = 2^14 = 16KB
> 4-Way Set: 16KB * 4 = 64KB.
same question regarding to this figure.