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