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