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