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