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