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)(17,18,23,27)(19,24,30,41)(20,31,34,43)(21,26,22,37)(25,36,44,33)(28,45,32,48)(29,39,35,40)(38,46,42,47)(1,3,5,4)(2,6,8,7)(9,11)(10,13)(12,15)(14,16)(17,19)(18,24)(20,28)(21,35)(22,29)(23,30)(25,38)(26,40)(27,41)(31,45)(32,34)(33,47)(36,46)(37,39)(42,44)(43,48)(1,3,5,4)(2,7,8,6)(11,15)(13,16)(17,20,22,33,23,34,21,36)(18,25,26,31,27,44,37,43)(19,28,29,47,30,32,35,46)(24,38,40,45,41,42,39,48)(1,4,5,3)(2,6,8,7)(11,15)(13,16)(17,19)(18,24)(20,32)(21,35)(22,29)(23,30)(25,42)(26,40)(27,41)(28,34)(31,48)(33,46)(36,47)(37,39)(38,44)(43,45)(10,14)(13,16)(17,21,23,22)(18,26,27,37)(19,29,30,35)(20,33,34,36)(24,39,41,40)(25,43,44,31)(28,46,32,47)(38,45,42,48)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.