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