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