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