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