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