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