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