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