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