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