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