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)(19,27)(20,22)(21,25)(23,26)(24,30)(28,31)(29,32) involution — undirected(1,2,4,6,5,8,11,13)(3,7,10,12,9,14,15,16)(17,19,22,30,23,31,21,29)(18,24,25,27,26,32,20,28)(1,3,5,9)(2,7,8,14)(4,10,11,15)(6,12,13,16)(17,20,21,26,23,25,22,18)(19,28,29,32,31,27,30,24)(2,8)(6,13)(7,14)(12,16) involution — undirected(3,9)(7,14)(10,15)(12,16)(17,21,23,22)(18,25,26,20)(19,29,31,30)(24,27,32,28)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.