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