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