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