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