One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,12)(4,9)(5,10)(6,15)(7,11)(8,13)(14,16)(18,23)(19,26)(20,21)(25,29)(27,28)(30,31) involution — undirected(1,3,7,4)(2,8,11,16)(5,13,6,14)(9,15,12,10)(17,18,22,25)(19,24,28,32)(20,23,21,29)(26,30,27,31)(1,4,7,3)(2,9,11,12)(5,13,6,14)(8,15,16,10)(17,19,22,28)(18,24,25,32)(20,26,21,27)(23,30,29,31)(1,5,7,6)(2,10,11,15)(3,13,4,14)(8,9,16,12)(17,20,22,21)(18,23,25,29)(19,27,28,26)(24,31,32,30)(1,5,7,6)(2,10,11,15)(3,14,4,13)(8,12,16,9)(18,25)(23,29)(24,32)(30,31)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.