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