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