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