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