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