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