Keywords: Symmetric group 4; Cayley graph 1,5,21 (adjacency matrix).svg Adjacency matrix of the Cayley graph of S<sub>4</sub> generated by blue 12 green 13 red 14 This is the corresponding graph called the Nauru graph 300px300px The red green and blue squares form the permutation matrices indexed 1 5 and 21 in the following file <br> Compare v Symmetric_group_S4 A_closer_look_at_the_Cayley_table <br> 1 5 and 21 are the generators of the Nauru graph 600px own Lipedia Nauru graph Adjacency matrices of Cayley graphs |