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