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