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