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