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