One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,12,7,14,30,46,8,15,31,47,35,50,77,95,9,13,6,32,29,48,33,79,36,49,34,80,76,96,81,117)(3,16,18,51,19,54,60,98,20,55,61,99,62,103,108,125,21,53,27,52,63,97,72,100,64,102,73,101,109,124,113,126)(4,22,23,43,24,65,67,92,25,66,68,93,69,110,111,123,26,11,28,42,70,44,74,90,71,45,75,91,112,94,114,122)(10,37,38,57,40,83,85,58,41,84,86,106,89,119,120,59,39,56,78,82,87,104,115,107,88,105,116,118,121,127,128,17)(1,3,6,18,7,19,33,60,8,20,34,61,35,62,81,108,9,21,5,27,29,63,30,72,36,64,31,73,76,109,77,113)(2,10,12,38,14,40,46,85,15,41,47,86,50,89,95,120,13,39,32,78,48,87,79,115,49,88,80,116,96,121,117,128)(4,17,23,56,24,57,67,104,25,58,68,105,69,106,111,127,26,59,28,37,70,82,74,83,71,107,75,84,112,118,114,119)(11,16,43,52,44,54,92,100,45,55,93,101,94,103,123,126,22,53,42,51,65,97,90,98,66,102,91,99,110,124,122,125)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.