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