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