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