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