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)(33,34,38,41)(35,42,39,36)(37,40,46,48)(43,47,45,44)(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)(34,36)(37,43)(38,39)(40,44)(41,42)(45,46)(47,48)(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)(33,34,38,41)(35,36,39,42)(37,40,46,48)(43,44,45,47)(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)(33,35)(34,36)(37,45)(38,39)(40,47)(41,42)(43,46)(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)(33,36)(34,39)(35,41)(37,44)(38,42)(40,45)(43,48)(46,47)(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)(33,37,38,46)(34,40,41,48)(35,43,39,45)(36,44,42,47)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.