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