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