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