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