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