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