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