... Γ36and Γ37are Cayley graphs and othersare not (See table 4). By table 8, |S| ∈ { 3, 4, 5, 6, 7, 8, 9}. By Theorem 2.11, the graphs Γ38, Γ39and Γ40are not Cayley graphs. It is clear ... Γ29is not a Cayley graphof D10.Therefore there a re exactly five connected, integral Cayley graphs with 10 vertices. Lemma 2.23 There are exactly three connected, integral Cayley graphs with ... |S| = 4, then by Lemma 2.14, Γ(S : C9) is not anintegral graph. Since the graphs Γ22, Γ23, Γ24and Γ25are 4-regular integral graphs with9 vertices, they are not Cayley graphs of C9.the...