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