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