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