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