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