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