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