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