Because links change as new versions release (Batocera v38, v39, v40, etc.), you should always go to the source. as they may contain malware.
Insert the card into your Pi and power it on. Batocera will automatically expand the storage to use the full 32GB on the first boot. Download - batocera.linux Download Batocera 32gb Raspberry Pi 3
Warning: Your 32GB card will appear as a tiny 512MB drive (called "BOOT") after flashing. This is normal. The rest of the space is occupied by the Linux partition, which Windows cannot read without special software. Because links change as new versions release (Batocera