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