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