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