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