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