Continuing their trend from Friday, Sydney started slowly and paid the price, conceeding an early penalty corner which Grafton pushed home to take an early lead.
The scores were evened up three minutes later when Scott Morrison whipped home a cross to complete one of Sydney's many attacking moves.
Mark Greaves finished the half by slotting home a field goal to double the Sydney score and ensure they went into the half on top.
Grafton were punished early in the second half when they failed to stop Dennis Van Es who completed a superb weaving run from outside the 25 by pushing home an excellent shot from 3 metres inside the circle to push Sydney out to a two goal lead.
Craig Boorman completed the scoring in the 46th minute, giving Sydney a 4 - 1 victory, completing a dominant performance,