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