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