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