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