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