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