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