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