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