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