The twenty common amino acids, and some of the less common amino acids have both three-letter and one-letter abbreviations. The one letter symbol for glutamate (Glu) is E. O is the abbreviation for pyrollyisine; http://www.ddbj.nig.ac.jp/sub/ref2-e.html
In other words, your tetrapeptide is LOVE in the one letter coding system for the amino acids.
If you want to build a model of a peptide, which is the general class of molecules to which your example, LOVE, belongs, I have done a similar exercise (a tripeptide made of three alanine residues, namely Ala-Ala-Ala or AAA) with a type of molecular model kit called Cochranes models. Sigma-Aldrich sells a kit that was designed with biochemistry (peptides and DNA) in mind. They are not particularly cheap; however, you could assemble a model without any more information that you already have. BTW, chemists are very clever or very lazy when they draw things. Not all of the hydrogen atoms are shown in the drawing you provide (because there are rules that govern how many there must be), and the vertices are carbon atoms, as curiouscat said.
The true three dimensional shape of a short peptide such as yours is very hard to predict, and is probably a family of many shapes that interconvert.