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