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