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