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