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