How can I convert bytes received in an AWS error message into something readable in Javascript?

I'm trying to debug an wrong signature calculation when accessing Amazon S3 via JavaScript. AWS returns an XML document which includes:

 <StringToSignBytes>41 57 53 34 2d 48 4d 41 43 2d 53 48 41 32 35 36 0a 32 30 31 35 30 34 32 35 54 31 36 32 33 30 36 5a 0a 32 30 31 35 30 34 32 35 2f 65 75 2d 77 65 73 74 2d 31 2f 73 33 2f 61 77 73 34 5f 72 65 71 75 65 73 74 0a 35 33 32 62 61 65 37 62 39 35 66 65 61 62 36 38 66 38 65 32 31 65 39 66 33 62 33 64 61 66 32 34 32 66 63 34 64 35 38 65 34 37 39 61 37 39 37 65 38 33 34 36 62 34 30 38 34 33 39 61 30 37 34 65</StringToSignBytes>

I'm wondering how to read these bytes (I'm sitting over debugging for so long, I'm getting desperate I guess...).

Currently I'm playing around in Node, but with things like:

console.log(new Buffer([41 57 53 34]).toString("utf8")) 

I'm getting really nowhere.

Question:
Is there a way to convert these bytes into something which might help me understand or find out why my request failed.

Thanks