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