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