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