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