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