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