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