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)(11,15)(12,13)(14,16)(17,18)(19,23)(20,24)(21,26)(22,25)(27,34)(28,35)(29,37)(30,36)(31,39)(32,38)(33,40)(41,45)(42,47)(43,46)(44,48) involution — undirected(2,6)(7,8)(10,13)(11,16)(17,19,22,30)(18,23,25,36)(20,27,31,42)(21,28,33,29)(24,34,39,47)(26,35,40,37)(32,41,44,43)(38,45,48,46)(1,3,5,4)(2,7,6,8)(9,11,12,16)(10,14,13,15)(17,20,22,31)(18,24,25,39)(19,27,30,42)(21,32,33,44)(23,34,36,47)(26,38,40,48)(28,41,29,43)(35,45,37,46)(1,4,5,3)(2,8,6,7)(10,13)(14,15)(19,28)(21,33)(23,35)(26,40)(27,41)(29,30)(32,44)(34,45)(36,37)(38,48)(42,43)(46,47)(2,6)(7,8)(10,13)(14,15)(18,25)(20,31)(23,36)(26,40)(27,42)(32,44)(35,37)(41,43) involution — undirectedA 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.