This is a sexist depiction having no evidence of diversity. They'd send up a different picture these days.
IIRC, the feminists and the multiculturalists had a hissy fit over this illustration, but the NASA folks (all white guys back then) just laughed at them.
What was that science fiction short story about the race of aliens who discovered and marveled over the one sole surviving artifact of human life? At the very end of the novel, the aliens stared wonderously at the undecypherable writing upon the roll of celluloid: "A film by Walt Disney."