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