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