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