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)(33,34,38,44,39,45,37,43)(35,40,47,56,48,57,52,62)(36,42,50,59,51,61,53,41)(46,55,64,58,49,60,63,54)(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)(33,35,39,48)(34,40,45,57)(36,49,51,46)(37,52,38,47)(41,58,59,54)(42,60,61,55)(43,62,44,56)(50,63,53,64)(17,19)(18,23)(20,29)(21,27)(22,28)(24,32)(25,26)(30,31)(33,36,39,51)(34,41,45,59)(35,46,48,49)(37,50,38,53)(40,54,57,58)(42,44,61,43)(47,63,52,64)(55,56,60,62)(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)(35,46)(37,53)(38,50)(39,51)(40,55)(41,43)(44,59)(45,61)(47,64)(48,49)(52,63)(54,62)(56,58)(57,60)(2,8)(6,9)(7,16)(14,15)(17,21,22,20)(18,24,25,30)(19,27,28,29)(23,32,26,31)(33,37,39,38)(34,43,45,44)(35,47,48,52)(36,50,51,53)(40,56,57,62)(41,42,59,61)(46,63,49,64)(54,60,58,55)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.