I have created a graph but i'm not able to add the label in the node, below my code
\begin{tikzpicture}
\SetGraphUnit{4}
\SetVertexArt
\renewcommand*{\VertexInnerSep}{8pt}
\renewcommand*{\VertexBallColor}{blue!50}
\Vertices{circle}{1,2,3,4,5,6,7,8}
\AddVertexColor{blue}{1,2,3,4,5,6,7,8}
\SetUpEdge[style={->,ultra thick},color=blue!50]
\Edge(1)(2)
\Edge(1)(3)
\Edge(1)(4)
\Edge(1)(5)
\Edge(1)(6)
\Edge(2)(3)
\Edge(2)(4)
\Edge(2)(5)
\Edge(2)(6)
\Edge(3)(4)
\Edge(3)(5)
\Edge(3)(6)
\Edge(4)(5)
\Edge(4)(6)
\Edge(5)(6)
\Edge(2)(6)
\Edge(2)(3)
\Edge(2)(1)
\Edge(2)(8)
\Edge(6)(3)
\Edge(6)(1)
\Edge(6)(8)
\Edge(3)(1)
\Edge(3)(8)
\Edge(1)(8)
\Edge(7)(8)
\Edge(5)(1)
\Edge(5)(6)
\Edge(5)(2)
\Edge(5)(7)
\Edge(1)(6)
\Edge(1)(2)
\Edge(1)(7)
\Edge(6)(2)
\Edge(6)(7)
\Edge(2)(7)
\end{tikzpicture}
Can you help me? Thanks in advance

tikzpackage, your code does not compile, so I guess you are using more than that. – cryingshadow Dec 05 '15 at 18:56