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