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