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