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