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