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