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