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