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