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