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