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