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