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