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