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