Ok... elves, dwarves, gnomes, halflings, orcs, giants and goblinoids, for instance, are close to looking like humans, because they have similar traits. However, you look at the other humanoids, like gnolls, lizardfolks, catfolks, ratfolks, boggards, kobolds and troglodytes, they look more like bipedal animals... for the most part.
Catfolks have clearly been described as either humans with feline traits (reference to the Bestiary 3's artwork) or bipedal cats (like in the Advance Race Guide); whether or not you love or hate the artworks is not to the point here. With this statement, it means that there are multiple "versions" of the same species, as they can look closer to a human or an animal.
With that in mind, could this happen to the races? Could we get a lizardfolk that looks more like a scaly human that a bipedal lizard, or a syrinx (a bipedal winged owl-like race, from the Inner Seas Bestiary) that looks more like a human with owl traits (similar to Owlboy)?
Hey, humans are descendants from primates that have evolved over time. While we don't know if bestial humanoids have evolved in a similar fashion, maybe they're not "fully evolved" or can evolve further and eventually look closer to a human than to its animal specie.