Pymol select residues types and highlight

select hydrophilics,(resn arg+lys+his+glu+asp+asn+gln+thr+ser+cys)

show sticks, (hydrophilics and !name c+n+o)

color green,hydrophilics

disable hydrophilics

set cartoon_smooth_loops,0

select pos,(resn arg+lys+his)

show sticks, (pos and !name c+n+o)

color marine,pos

disable pos

select neg,(resn glu+asp)

show sticks, (neg and !name c+n+o)

color red,neg

disable neg

set cartoon_smooth_loops,0

select hydrophobes,(resn ala+gly+val+ile+leu+phe+met)

show sticks, (hydrophobes and (!name c+n+o))

color orange,hydrophobes

disable hydrophobes

set cartoon_smooth_loops,0

select aromatics,(resn phe+tyr+trp+his)

show sticks, (aromatics and (!name c+n+o))

color green,aromatics

disable aromatics

set cartoon_smooth_loops,0