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