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