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