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