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