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