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