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