The rules on dragons as innate spellcasters state (MM, p. 86):
Dragons are innately magical creatures that can master a few spells as they age, using this variant.
A young or older dragon can innately cast a number of spells equal to its Charisma modifier. Each spell can be cast once per day, requiring no material components...
No other components are waived.
This is a rare case where the specific spells that the creature can cast aren't specified. It has also been stated elsewhere that innate spellcasting only removes a requirement for components if there is text that says it does.
Now, I know that logically, most DMs would just rule that dragons can use their front front claws (which in most pictures of them do not resemble hands) to perform the somatic components of spells. But RAW, somatic components require the use of hands.
If a spell requires a somatic component, the caster must have free use of at least one hand to perform these gestures. (PHB, p. 203)
So according to the Rules as Written, can innate spellcaster dragons cast spells with somatic components? Or are they restricted to those few spells with only verbal and/or material components?