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