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