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