Here is a thread with steps to get uefi install of 3.2 working on the p51 from a few weeks ago
https://groups.google.com/forum/m/#!topic/qubes-users/4VsKdxnKHBk Cbeers, Tim -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-users+unsubscr...@googlegroups.com. To post to this group, send email to qubes-users@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/2040e8e3-e440-4df4-9098-fa7d9376a7a8%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.