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