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