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