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