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