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