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)(14,16)(17,18,21,22)(19,25,27,23)(20,24,28,29)(26,31,32,30)(33,34)(35,40)(36,42)(37,39)(38,45)(41,46)(43,48)(44,47)(3,8)(5,7)(10,13)(14,16)(18,22)(20,28)(23,25)(26,32)(33,35,39,36)(34,40,37,42)(38,43,46,44)(41,47,45,48)(9,10)(11,14)(12,13)(15,16)(17,18)(19,23)(20,24)(21,22)(25,27)(26,30)(28,29)(31,32)(33,36,39,35)(34,40,37,42)(38,44,46,43)(41,47,45,48)(1,3)(2,5)(4,8)(6,7)(17,19,21,27)(18,23,22,25)(20,26,28,32)(24,30,29,31)(33,37,39,34)(35,42,36,40)(38,45,46,41)(43,48,44,47)(1,2)(3,5)(4,6)(7,8)(9,11)(10,14)(12,15)(13,16)(17,20)(18,24)(19,26)(21,28)(22,29)(23,30)(25,31)(27,32)(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.