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