You should find the following resources very useful:

• Examine the Graphviz utility website. This utility lets you draw graphs using its own language: http://graphviz.org/.
• Read the documentation page of the sub packages of the container standard Go package by visiting https://golang.org/pkg/container/.
• Should you wish to learn more about data structures, you should read The Design and Analysis of Computer Algorithms by Alfred V. Aho,‎ John E. Hopcroft, and‎ Jeffrey D. Ullman (Addison-Wesley, 1974). It is an excellent book!
• Other really interesting books about algorithms and data structures are Programming Pearls by Jon Bentley (Addison-Wesley Professional, 1999) and More Programming Pearls: Confessions of a Coder also by John Bentley (Addison-Wesley Professional, 1988). Reading both books will make you a better programmer!