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