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