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