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