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