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