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