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