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