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