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