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