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