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