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