The answer is clusters like bunches of grapes. Milady's phrasing is vivid and exact: staphylococci "are pus-forming bacteria that grow in clusters like bunches of grapes." That grouping shape is literally where the name comes from — "staphyle" is Greek for a bunch of grapes — which makes it one of the easier Sanitation facts to remember once you know the etymology.
This pairs directly with the diplococci question above: diplococci grow in pairs, streptococci grow in chains, and staphylococci grow in clusters — three different bacterial shapes the exam expects barbers to be able to tell apart by name.
Milady Standard Barbering, 6th ed., Ch. 4 (Infection Control), p. 65: "Staphylococci... are pus-forming bacteria that grow in clusters like bunches of grapes."
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More real Sanitation questions with sourced answers: What Does Pus Indicate, Which Process Destroys All Microbial Life, Including Spores, What Destroys Most Bacteria, Fungi, and Viruses on Surfaces, What Do Antiseptics Contain a High Volume Of, and 15 more on the Sanitation practice questions page.
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