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