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