Unfortunately with a 5-wire motor like this you have to use trial and error to work out the sequence,
you can't measure the windings on a multimeter as they are all the same.
With access to a 4 channel 'scope you can turn a 5-wire motor and look at the relative phases of the wires
simultaneously (though these little motors have so much gearing down you can necessarily turn them from
the output shaft).
There seems to be no consistency or standards for colour-coding motor wiring in my experience, as a given
motor is made with many options (shaft length, shaft end, encoder, voltage, bearing quality, etc etc), and
its infeasible to explain all the combinations on a datasheet. Each motor you come across is a new adventure!