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