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