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