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