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