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