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