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