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