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