For sure, see the bamtofastq tool from bedtools:
$ bedtools bamtofastq -i NA18152.bam -fq NA18152.fq
To get paired-end fastq files (requires sorting):
$ samtools sort -n aln.bam aln.qsort
$ bedtools bamtofastq -i aln.qsort.bam \
-fq aln.end1.fq \
Also, it seems like your dataset has an SRP under secondary accession (SRP145274), so presumably you should be able to get the fastq files from SRA.
Example: GSM3138950 from this project has the following sequencing run: SRR7142657
And the .sra file from the SRA FTP server:
You can extract fastq files from .sra files using fastq-dump.