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