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