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