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