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