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