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