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)(11,14)(12,13)(15,16)(17,18,22,26)(19,28,21,24)(20,32,34,25)(23,27,37,45)(29,39,36,47)(30,41,31,40)(33,42,48,43)(35,46,38,44)(2,5)(6,8)(17,19,22,21)(18,24,26,28)(20,33,34,48)(23,30,37,31)(25,42,32,43)(27,40,45,41)(29,38,36,35)(39,46,47,44)(10,13)(14,16)(17,20,22,34)(18,25,26,32)(19,29,21,36)(23,38,37,35)(24,39,28,47)(27,46,45,44)(30,33,31,48)(40,42,41,43)(9,11,12,15)(10,14,13,16)(17,21,22,19)(18,24,26,28)(20,33,34,48)(23,31,37,30)(25,43,32,42)(27,40,45,41)(29,38,36,35)(39,44,47,46)(1,3,4,7)(2,6,5,8)(19,30)(21,31)(23,37)(24,40)(27,45)(28,41)(29,33)(35,38)(36,48)(39,42)(43,47)(44,46)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.