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