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