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