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