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