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