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)(19,30)(20,34)(21,36)(22,28)(23,29)(24,27)(25,33)(26,31)(32,44)(35,47)(37,48)(38,43)(39,42)(40,46)(41,45)(1,3)(2,5)(4,8)(6,7)(17,19,23,33)(18,25,29,30)(20,21,31,24)(22,35,38,45)(26,36,34,27)(28,41,43,47)(32,39,46,37)(40,42,44,48)(10,13)(14,16)(17,20,24,19,23,31,21,33)(18,26,27,25,29,34,36,30)(22,35,39,32,38,45,37,46)(28,41,42,40,43,47,48,44)(2,6)(5,7)(17,21,23,24)(18,27,29,36)(19,31,33,20)(22,37,38,39)(25,26,30,34)(28,42,43,48)(32,45,46,35)(40,41,44,47)(3,8)(5,7)(9,11,12,15)(10,14,13,16)(17,22,21,37,23,38,24,39)(18,28,36,48,29,43,27,42)(19,32,20,35,33,46,31,45)(25,40,26,41,30,44,34,47)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.