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