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