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