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