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