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