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