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