The GrayGraph() command returns the Gray graph, a bipartite cubic graph with 54 vertices and 81 edges.

It was discovered by Marion Gray in 1932.

$\mathrm{with}\left(\mathrm{GraphTheory}\right)\:$

$\mathrm{with}\left(\mathrm{SpecialGraphs}\right)\:$

$G≔\mathrm{GrayGraph}\left(\right)$

$G≔\mathrm{Graph\; 1:\; an\; undirected\; graph\; with\; 54\; vertices\; and\; 81\; edges}$

$\mathrm{IsBipartite}\left(G\right)$

$\mathrm{true}$

$\mathrm{DrawGraph}\left(G\right)$

"Gray graph", Wikipedia. http://en.wikipedia.org/wiki/Gray_graph

The GraphTheory[SpecialGraphs][GrayGraph] command was introduced in Maple 2018.

For more information on Maple 2018 changes, see Updates in Maple 2018.