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