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