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