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