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