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