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