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