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