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