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