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