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