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