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