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