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