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