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