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