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