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