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