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