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