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