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