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