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