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