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