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