One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,17,22,52)(4,25)(5,32)(6,36)(7,39)(8,42)(9,16)(10,20,45,33)(11,28)(12,18)(13,26)(14,37)(15,40)(19,63,67,114)(21,74,73,47)(23,77,71,111)(24,78,76,44)(27,50)(29,91)(30,94)(31,83)(34,54)(35,97)(38,96)(41,53)(43,100,101,68)(46,104,103,64)(48,92)(49,107)(51,90)(55,85)(56,62)(57,108,105,66)(58,60,98,72)(59,70,95,75)(61,80)(65,118,86,79)(69,109,122,116)(81,84)(82,89)(87,124)(88,99)(93,123)(102,121,115,119)(106,125)(110,112,126,120)(113,127,128,117)(1,3,18,60,41,71,6,21,40,76,85,104,37,75,5,33,9,22,62,72,7,23,38,73,8,24,26,64,34,70,35,20)(2,10,32,95,54,103,55,78,42,74,36,77,39,98,12,52,16,45,97,59,14,46,13,44,15,47,96,111,53,58,56,17)(4,19,61,112,93,100,28,66,92,122,125,127,89,121,27,86,31,67,107,120,29,68,90,108,30,69,84,117,87,119,88,65)(11,43,91,126,80,114,83,118,99,115,82,113,81,116,48,105,51,101,123,110,49,63,25,79,50,102,124,128,106,109,94,57)(1,4,26,84,7,29,5,27,40,92,18,61,34,87,38,90,9,31,85,125,41,93,35,88,8,30,62,107,37,89,6,28)(2,11,36,82,14,49,56,94,42,99,97,123,53,106,55,83,16,51,96,124,54,80,12,48,15,50,32,91,39,81,13,25)(3,19,64,117,23,68,33,86,76,122,60,112,70,119,73,108,22,67,104,127,71,100,20,65,24,69,72,120,75,121,21,66)(10,43,77,113,46,63,17,57,74,115,59,110,58,109,78,118,45,101,111,128,103,114,52,105,47,102,95,126,98,116,44,79)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.