One vertex per element, one color per generator, with an edge from x to x·s.
(5,6,8,10)(7,11,12,9)(13,14,16,22,33,47,63,41,18,24,34,48,38,52,57,42,19,25,35,49,60,72,67,53,37,51,62,40,17,23,31,20)(15,26,27,50,36,69,65,44,29,55,58,73,61,74,66,45,30,56,59,76,70,75,68,54,39,71,64,43,28,46,32,21)(1,2)(3,4)(5,7,8,12)(6,9,10,11)(14,20)(16,31)(17,33)(18,37)(21,26)(22,23)(24,53)(25,42)(27,32)(28,36)(29,39)(34,67)(35,57)(38,60)(40,47)(41,51)(43,69)(44,71)(45,56)(46,50)(48,72)(49,52)(54,55)(58,68)(59,66)(61,70)(62,63)(64,65)(73,75)(74,76)(2,4)(13,15,19,30)(14,21,25,45)(16,32,35,66)(17,36,38,70)(18,39,37,29)(20,26,42,56)(22,46,49,74)(23,50,52,76)(24,54,51,44)(27,57,59,31)(28,60,61,33)(34,68,62,65)(40,69,48,75)(41,71,53,55)(43,72,73,47)(58,63,64,67)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.