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)(11,13)(12,16)(14,15)(17,18)(19,25)(20,26)(21,29)(22,23)(24,30)(27,28)(31,32)(3,7)(5,8)(10,15)(11,16)(18,23)(20,25)(21,30)(27,32) involution — undirected(1,2)(3,5)(4,6)(7,8)(9,11,14,16)(10,12,15,13)(18,23)(19,26)(24,29)(27,32)(9,12,14,13)(10,11,15,16)(17,19,22,26)(18,20,23,25)(21,27,30,32)(24,28,29,31)(1,3)(2,5)(4,7)(6,8)(9,10)(11,12)(13,16)(14,15)(17,20)(18,19)(21,28)(22,25)(23,26)(24,27)(29,32)(30,31) involution — undirected(1,2)(3,5)(4,6)(7,8)(9,13,14,12)(10,16,15,11)(17,21,22,30)(18,24,23,29)(19,27,26,32)(20,28,25,31)A 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.