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