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