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