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