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