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