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