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