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