Quartus Versions 14.1 and later are not available as 32-bit software.
However, you can use Quartus 14.0 which is 32 bit edition.
Check the below link for more information.
It doesn't have 32 bit download option. And I have downloaded 14.0 linux setup file and when I run it on my 32 bit OS It displayed error message which said that this is a 64 bit program and may not run in 32 bit OS.😕
Apologies for the inconvenience caused,