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