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