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