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