From where do you get the 32 paths to the LUN (maximum supported) ? If it was from vSphere 5.5 Configuration Maximums, this number refer to the maximum number of paths to an LUN per server, not for entire cluster.
The maximum cluster size at version 5.5 is 32 hosts per cluster... each host supports a total of 1024 paths and a maximum number of 32 paths to a specific LUN, if you are using 4 paths per LUN, the maximum number of LUNs per host will be 256... the te size of cluster will still be 32 hosts.