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