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