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