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