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