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