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