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