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)(17,18,24,29)(19,28,32,40)(20,26,35,44)(21,27,23,38)(22,37,31,25)(30,42,46,48)(33,41,36,43)(34,47,45,39)(1,3)(2,6)(4,7)(5,8)(9,11)(10,12)(13,15)(14,16)(17,19,21,22,24,32,23,31)(18,25,38,40,29,37,27,28)(20,30,36,34,35,46,33,45)(26,39,41,48,44,47,43,42)(1,4,5,2)(3,7,8,6)(10,15)(11,16)(17,20)(18,26)(19,30)(21,36)(22,34)(23,33)(24,35)(25,39)(27,43)(28,42)(29,44)(31,45)(32,46)(37,47)(38,41)(40,48)(3,8)(6,7)(9,12,14,13)(10,11,15,16)(17,21,24,23)(18,27,29,38)(19,31,32,22)(20,33,35,36)(25,40,37,28)(26,41,44,43)(30,34,46,45)(39,42,47,48)(9,13,14,12)(10,11,15,16)(17,22,21,32,24,31,23,19)(18,28,38,25,29,40,27,37)(20,34,36,46,35,45,33,30)(26,42,41,39,44,48,43,47)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.