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