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