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