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