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