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