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