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