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