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