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