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