The generator matrix

 1  0  0  1  1  1  2  2  6  4  1  1  1  0  1  1  2  1  6  1  6  1  6  1  1  0  4  1  2  1  1  1  1  1  1  4  1  1  1  1  0  1  1  1  6  0  1  1  1  2  1  1  1  0  4  6  6
 0  1  0  0  5  5  1  6  1  1  1  1  2  1  3  7  1  6  0  4  6  2  1  5  1  2  1  6  1  7  4  3  4  2  2  1  2  7  0  0  0  3  3  5  4  1  7  1  6  1  0  6  4  1  1  1  1
 0  0  1  3  7  4  7  1  6  1  5  2  1  6  6  3  1  7  1  2  1  6  5  6  3  1  7  4  0  6  5  5  1  2  3  1  1  5  0  7  1  4  0  4  1  7  3  1  0  3  6  6  7  6  4  2  0
 0  0  0  4  4  0  4  4  4  0  0  4  0  4  4  0  0  0  0  0  0  4  4  0  0  4  4  0  4  0  0  4  4  0  4  4  4  0  4  0  4  4  0  4  4  0  4  4  4  0  4  0  4  0  4  0  0

generates a code of length 57 over Z8 who´s minimum homogenous weight is 54.

Homogenous weight enumerator: w(x)=1x^0+176x^54+288x^55+266x^56+60x^58+6x^60+80x^62+96x^63+45x^64+4x^66+2x^68

The gray image is a code over GF(2) with n=228, k=10 and d=108.
This code was found by Heurico 1.16 in 25.1 seconds.