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