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)(35,44)(36,48)(37,42)(38,40)(39,45)(41,50)(43,52)(46,54)(47,53)(49,57)(51,58)(55,59)(56,62)(60,64)(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)(34,39)(36,49)(37,45)(38,47)(40,55)(41,57)(42,44)(43,53)(46,50)(48,54)(51,61)(52,59)(56,63)(58,64)(60,62)(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)(35,45)(36,50)(38,52)(39,53)(41,58)(42,43)(44,55)(48,56)(54,64)(57,63)(60,61)(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)(34,41)(35,46)(37,50)(38,51)(39,54)(40,56)(42,48)(43,58)(44,57)(45,49)(47,60)(52,62)(53,63)(55,64)(59,61)(2,10)(7,11)(8,9)(15,16)(17,20,21,28)(18,24,22,29)(19,27,26,32)(23,30,25,31)(34,42)(35,45)(36,50)(40,43)(47,59)(51,62)(54,57)(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.