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