yes, a load average of 62 indicates something is happening. few people have more than 32 cores in their mysql servers.
show full processlist, might just be a ton of long queries running
else, dump perf schema digest, truncate it, let it collect with the high load for a while, look at the top queries by sum_timer_wait
oh, and of course check for anything non-mysql using cpu
can probably be solved by optimizing the queries using all that cpu time, or, through thread concurrency setup or thread pooling