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