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