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