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