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