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)(33,34,39,54,38,44,37,43)(35,45,47,58,48,40,49,57)(36,42,51,41,52,60,53,61)(46,62,64,59,50,56,63,55)(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)(33,35,38,48)(34,40,44,45)(36,50,52,46)(37,49,39,47)(41,59,61,55)(42,62,60,56)(43,58,54,57)(51,63,53,64)(17,19)(18,23)(20,29)(21,27)(22,28)(24,32)(25,26)(30,31)(33,36,38,52)(34,41,44,61)(35,46,48,50)(37,51,39,53)(40,55,45,59)(42,43,60,54)(47,63,49,64)(56,58,62,57)(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)(35,46)(37,53)(38,52)(39,51)(40,56)(41,54)(43,61)(44,60)(45,62)(47,64)(48,50)(49,63)(55,57)(58,59)(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)(34,43,44,54)(35,47,48,49)(36,51,52,53)(40,57,45,58)(41,60,61,42)(46,63,50,64)(55,56,59,62)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.