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