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