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