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