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